function get_by_id(id){
	if(document.getElementById(id)==null)
	 	return document.getElementsByName(id);
	else 
		return document.getElementById(id);
}

function get_by_name(name){
	return document.getElementsByName(name);
}

function send_submit(which_form){
	get_by_id(which_form).submit();
}

function ShowWizard(name){
        window.open(name,"Wizard","width=450,height=370")
}

function ShowPage(name){
				window.open(name,"Showpage","width=1000,height=500,resizable=1,scrollbars=1")
}

function validateNum(str)
{
  for (var i=0; i<str.length; i++) {
   	if ( !(str.charAt(i) >='0' && str.charAt(i) <= '9')) {
		alert("Invalid value. It should be in decimal number (0-9).");
		return false;
  	}
  }
  return true;
}

function do_reboot()
{
	if(confirm("Reboot DAP-1360?")){
		location.href="apply.cgi?do_reboot";
		return true;
	}
	else{
	 return false;
	}
}
		
var subnet_mask = new Array(0, 128, 192, 224, 240, 248, 252, 254, 255);
var INVALID_IP = 0;
var ZERO_IP = 1;
var FIRST_IP_ERROR = 2;
var SECOND_IP_ERROR = 3;
var THIRD_IP_ERROR = 4;
var FOURTH_IP_ERROR = 5;
var FIRST_RANGE_ERROR = 6;
var SECOND_RANGE_ERROR = 7;
var THIRD_RANGE_ERROR = 8;
var FOURTH_RANGE_ERROR = 9;
var FOURTH_RANGE_ERROR1 = 10;
var RADIUS_SERVER_PORT_ERROR = 11;
var RADIUS_SERVER_SECRET_ERROR = 12;

var ip_addr_msg = new Array("The IP address is an invalid address.",
						       "The IP address address of IP address must be an integer.",
						       "The 1st address of IP address must be an integer.",
						       "The 2nd address of IP address must be an integer.",
						       "The 3rd address of IP address must be an integer.",
						       "The 4th address of IP address must be an integer.",
						       "The 1st range of IP address must be between 1 to 254.",
						       "The 2nd range of IP address must be between 0 to 255.",
						       "The 3rd range of IP address must be between 0 to 255.",
						       "The 4th range of IP address must be between 1 to 254.",
						       "The 4th range of IP address must be between 0 to 255."
						      );

var subnet_mask_msg = new Array("The Subnet Mask is an invalid address.",
						           "The Subnet Mask can not be zero.",
						           "The 1st address of Subnet Mask must be an integer.",
						    	   "The 2nd address of Subnet Mask must be an integer.",
						    	   "The 3rd address of Subnet Mask must be an integer.",
						    	   "The 4th address of Subnet Mask must be an integer.",
						    	   "The 1st range of Subnet Mask must be 128, 192, 224, 240, 248, 252, 254, 255.",
						    	   "The 2nd range of Subnet Mask must be 0, 128, 192, 224, 240, 248, 252, 254, 255.",
						    	   "The 3rd range of Subnet Mask must be 0, 128, 192, 224, 240, 248, 252, 254, 255.",
						    	   "The 4th range of Subnet Mask must be 0, 128, 192, 224, 240, 248, 252, 254."
						          );

var gateway_msg = new Array("The Gateway address is an invalid address.",
						       "The Gateway address can not be zero.",
						       "The 1st address of Gateway address must be an integer.",
						       "The 2nd address of Gateway address must be an integer.",
						       "The 3rd address of Gateway address must be an integer.",
						       "The 4th address of Gateway address must be an integer.",
						       "The 1st range of Gateway address must be between 1 to 254.",
						       "The 2nd range of Gateway address must be between 0 to 255.",
						       "The 3rd range of Gateway address must be between 0 to 255.",
						       "The 4th range of Gateway address must be between 1 to 254.",
						       "The 4th range of Gateway address must be between 0 to 255."
						       );

var server_msg = new Array("The server address is an invalid address.",
						       "The server address can not be zero.",
						       "The 1st address of server address must be an integer.",
						       "The 2nd address of server address must be an integer.",
						       "The 3rd address of server address must be an integer.",
						       "The 4th address of server address must be an integer.",
						       "The 1st range of server address must be between 1 to 254.",
						       "The 2nd range of server address must be between 0 to 255.",
						       "The 3rd range of server address must be between 0 to 255.",
						       "The 4th range of server address must be between 1 to 254.",
						       "The 4th range of server address must be between 0 to 255."
						       );

function addr_obj(addr, e_msg, allow_zero, is_network){
	this.addr = addr;
	this.e_msg = e_msg;
	this.allow_zero = allow_zero;
	this.is_network = is_network;
}

function check_current_range(order, my_obj, checking_ip, mask){
	var which_ip = (my_obj.addr[order]).split(" ");
	var start, end;

	if (isNaN(which_ip) || which_ip == "" || which_ip.length > 1 || (which_ip[0].length > 1 && which_ip[0].substring(0,1) == "0")){
		alert(my_obj.e_msg[FIRST_IP_ERROR + order]);
		return false;
	}
	
	if (order == 0){
		start = 1;	
	}else{
		start = 0;				
	}
	
	if (mask[order] != 255){				
		if (parseInt(checking_ip[order]) >= 0 && parseInt(checking_ip[order]) <= 255){	
			end = (~mask[order]+256);				
			start = mask[order] & checking_ip[order];	
			end += start;
		
			if (end > 255){
				end = 255;
			}
		}else{
			end = 255;
		}
	}else{
		end = 255;
	}
	
	if (order == 3){
		if ((mask[0] == 255) && (mask[1] == 255) && (mask[2] == 255)){
			start += 1;
			end -= 1;
		}else{		
			if (((mask[0] | (~my_obj.addr[0]+256)) == 255) && ((mask[1] | (~my_obj.addr[1]+256)) == 255) && ((mask[2] | (~my_obj.addr[2]+256)) == 255)){
				start += 1;
			}
			
			if (((mask[0] | my_obj.addr[0]) == 255) && ((mask[1] | my_obj.addr[1]) == 255) && ((mask[2] | my_obj.addr[2]) == 255)){			
				end -= 1;
			}	
		}	
	}
		
	if (parseInt(which_ip) < start || parseInt(which_ip) > end){			
		//alert(my_obj.e_msg[FIRST_RANGE_ERROR + order] + " " + start + " ~ " + end + ".");	
		alert(my_obj.e_msg[FIRST_RANGE_ERROR + order]);		
		return false;
	}
	
	return true;
}

function check_ip_range(order, my_obj, mask){
	var which_ip = (my_obj.addr[order]).split(" ");
	var start, end;

	if (isNaN(which_ip) || which_ip == "" || which_ip.length > 1 || (which_ip[0].length > 1 && which_ip[0].substring(0,1) == "0")){
		alert(my_obj.e_msg[FIRST_IP_ERROR + order]);
		return false;
	}
	
	if (order == 0){
		start = 1;	
	}else{
		start = 0;				
	}
		
	if (mask[order] != 255){		
		if (parseInt(which_ip) >= 0 && parseInt(which_ip) <= 255){	
			end = (~mask[order]+256);				
			start = mask[order] & which_ip;	
			end += start;
		
			if (end > 255){
				end = 255;
			}
		}else{
			end = 255;
		}
	}else{
		end = 255;
	}
	
	
	if (order == 3){
		if ((mask[0] == 255) && (mask[1] == 255) && (mask[2] == 255)){
			start += 1;
			end -= 1;
		}else{								
			if (((mask[0] | (~my_obj.addr[0]+256)) == 255) && ((mask[1] | (~my_obj.addr[1]+256)) == 255) && ((mask[2] | (~my_obj.addr[2]+256)) == 255)){
				start += 1;
			}
			
			if (((mask[0] | my_obj.addr[0]) == 255) && ((mask[1] | my_obj.addr[1]) == 255) && ((mask[2] | my_obj.addr[2]) == 255)){			
				end -= 1;
			}				
		}
	}
		
	if (parseInt(which_ip) < start || parseInt(which_ip) > end){			
		alert(my_obj.e_msg[FIRST_RANGE_ERROR + order] + " " + start + " ~ " + end + ".");		
		return false;
	}
	
	return true;
}

function check_IP(ip_address, msg_title){
	var ip_split;
	var re=/^(\d{1,3}\.){3}\d{1,3}$/gi;
	var chkflag=true;
	var ErrMsg="The "+msg_title+" is an invalid address!"
	if(ip_address.search(re)==-1){
		chkflag=false;
	}else{
		ip_split=ip_address.split(".");
		for(i=0;i<4;i++){
			if(ip_split[i]>255){
				chkflag=false;
				break;
			}
			if(i==3 && ip_split[i]>=255){
				chkflag=false;
				break;
			}
		}
	}
	if(!chkflag)
	alert(ErrMsg);
	return chkflag;
} 

function check_address(my_obj, mask_obj, ip_obj){
	var count_zero = 0;
	var count_bcast = 0;	
	var ip = my_obj.addr;
	var mask;
	
	if (my_obj.addr.length == 4){
		for(var i = 0; i < ip.length; i++){
			if (ip[i] == "0"){
				count_zero++;			
			}				
		}

		if (!my_obj.allow_zero && count_zero == 4){
			alert(my_obj.e_msg[ZERO_IP]);
			return false;
		}else if (count_zero != 4){
			count_zero = 0;
				
			if (check_address.arguments.length >= 2 && mask_obj != null){
				mask = mask_obj.addr;
			}else{
				mask = new Array(255,255,255,0);
			}
						
			for(var i = 0; i < ip.length; i++){
				
				if (check_address.arguments.length == 3 && ip_obj != null){
					if (!check_current_range(i, my_obj, ip_obj.addr, mask)){
						return false;
					}
				}else{					
					if (!check_ip_range(i, my_obj, mask)){
						return false;
					}
				}
			}		
							
			for (var i = 0; i < 4; i++){
				if (((~mask[i] + 256) & ip[i]) == 0){
					count_zero++;						
				}
								
				if ((mask[i] | ip[i]) == 255){
					count_bcast++;
				}
			}
		
			if ((count_zero == 4 && !my_obj.is_network) || (count_bcast == 4)){
				alert(my_obj.e_msg[INVALID_IP]);			
				return false;
			}													
		}
	}else{
		alert(my_obj.e_msg[INVALID_IP]);
		return false;
	}

	return true;
}

function IsNumeric(sText) 
{   //§PÂ_¬O§_¬°¼Æ­È 
	var ValidChars = "0123456789."; 
	var IsNumber=true; 
	var Char; 
	  
	for (i = 0; i < sText.length && IsNumber == true; i++)  
	   {  
	   		Char = sText.charAt(i);  
	        if (ValidChars.indexOf(Char) == -1)  
	        { 
	            IsNumber = false; 
	        } 
	   } 
	return IsNumber;    
} 

function check_mask(my_mask){
	var temp_mask = my_mask.addr;

	if (temp_mask.length == 4){
		for (var i = 0; i < temp_mask.length; i++){
			var which_ip = temp_mask[i].split(" ");
			var mask = parseInt(temp_mask[i]);
			var in_range = false;
			var j = 0;

			if (isNaN(which_ip) || which_ip == "" || which_ip.length > 1 || (which_ip[0].length > 1 && which_ip[0].substring(0,1) == "0")){
				alert(my_mask.e_msg[FIRST_IP_ERROR + i]);
				return false;
			}

			if (i == 0){
				j = 1;
			}

			for (; j < subnet_mask.length; j++){
				if (mask == subnet_mask[j]){
					in_range = true;
					break;
				}else{
					in_range = false;
				}
			}

			if (!in_range){
				alert(my_mask.e_msg[FIRST_RANGE_ERROR + i]);
				return false;
			}

			if (i != 0 && mask != 0){
				if (parseInt(temp_mask[i-1]) != 255){
					alert(my_mask.e_msg[INVALID_IP]);
					return false;
				}
			}

			if (i == 3 && parseInt(mask) >= 255){
				alert(my_mask.e_msg[FOURTH_RANGE_ERROR]);
				return false;
			}
		}
	}else{
		alert(my_mask.e_msg[INVALID_IP]);
		return false;
	}

	return true;
}

var app_port_id = new Array(
									"21","21","1",
						      "80","80","1",
						      "443","443","1",
									"53","53","2",
						      "25","25","1",
						      "110","110","1",
						      "23","23","1",
						      "500","500","2",
						      "1723","1723","1",
						      "1503","1503","1"
						      );

function pin_checksum(PIN)
{
	var accum = 0;
	var digit;
	
	PIN *= 10;
	accum += 3 * (parseInt(PIN / 10000000) % 10); 	
	accum += 1 * (parseInt(PIN / 1000000) % 10);
	accum += 3 * (parseInt(PIN / 100000) % 10);
	accum += 1 * (parseInt(PIN / 10000) % 10); 
	accum += 3 * (parseInt(PIN / 1000) % 10); 
	accum += 1 * (parseInt(PIN / 100) % 10); 
	accum += 3 * (parseInt(PIN / 10) % 10);

	digit = (accum % 10);
	return (10 - digit) % 10;
}

/*                                                                                                 
 * set_form_default_values                                                                         
 *	Save a form's current values to a custom attribute.                                            
 */                                                                                                
function set_form_default_values(form_id)                                                          
{                                                                                                  
	var df = document.forms[form_id];                                                                
	if (!df) {                                                                                       
		return;                                                                                        
	}                                                                                                
	for (var i = 0, k = df.elements.length; i < k; i++) {                                            
		var obj = df.elements[i];                                                                      
		if (obj.getAttribute('modified') == 'ignore') {                                                
			continue;                                                                                    
		}                                                                                              
		var name = obj.tagName.toLowerCase();                                                          
		if (name == 'input') {                                                                         
			var type = obj.type.toLowerCase();                                                           
			if ((type == 'text') || (type == 'textarea') || (type == 'password') || (type == 'hidden')) {
				obj.setAttribute('default', obj.value);                                                    
				/* Workaround for FF error when calling focus() from an input text element. */             
				if (type == 'text') {                                                                      
					obj.setAttribute('autocomplete', 'off');                                                 
				}                                                                                          
			} else if ((type == 'checkbox') || (type == 'radio')) {                                      
				obj.setAttribute('default', obj.checked);                                                  
			}                                                                                            
		} else if (name == 'select') {                                                                 
			var opt = obj.options;                                                                       
			for (var j = 0; j < opt.length; j++) {                                                       
				opt[j].setAttribute('default', opt[j].selected);                                           
			}                                                                                            
		}                                                                                              
	}                                                                                                
	df.setAttribute('saved', "true");                                                                
}

/*
 * is_form_modified
 *	Check if a form's current values differ from saved values in custom attribute.
 *	Function skips elements with attribute: 'modified'= 'ignore'. 
 */
function is_form_modified(form_id)
{
	var df = document.forms[form_id];
	if (!df) {
		return false;
	}
	if (df.getAttribute('modified') == "true") {
		return true;
	}
	if (df.getAttribute('saved') != "true") {
		return false;
	}

	for (var i = 0, k = df.elements.length; i < k; i++) {
		var obj = df.elements[i];
		if (obj.getAttribute('modified') == 'ignore') {
			continue;
		}
		var name = obj.tagName.toLowerCase();
		if (name == 'input') {
			var type = obj.type.toLowerCase();
			if (((type == 'text') || (type == 'textarea') || (type == 'password') || (type == 'hidden')) &&
					!are_values_equal(obj.getAttribute('default'), obj.value)) {
				return true;
			} else if (((type == 'checkbox') || (type == 'radio')) && !are_values_equal(obj.getAttribute('default'), obj.checked)) {
				return true;
			}
		} else if (name == 'select') {
			var opt = obj.options;
			for (var j = 0; j < opt.length; j++) {
				if (!are_values_equal(opt[j].getAttribute('default'), opt[j].selected)) {
					return true;
				}
			}
		}
	}
	return false;
}

/*
 * are_values_equal()
 *	Compare values of types boolean, string and number. The types may be different.
 *	Returns true if values are equal.
 */
function are_values_equal(val1, val2)
{
	/* Make sure we can handle these values. */
	switch (typeof(val1)) {
	case 'boolean':
	case 'string':
	case 'number':
		break;
	default:
		// alert("are_values_equal does not handle the type '" + typeof(val1) + "' of val1 '" + val1 + "'.");
		return false;
	}

	switch (typeof(val2)) {
	case 'boolean':
		switch (typeof(val1)) {
		case 'boolean':
			return (val1 == val2);
		case 'string':
			if (val2) {
				return (val1 == "1" || val1.toLowerCase() == "true" || val1.toLowerCase() == "on");
			} else {
				return (val1 == "0" || val1.toLowerCase() == "false" || val1.toLowerCase() == "off");
			}
			break;
		case 'number':
			return (val1 == val2 * 1);
		}
		break;
	case 'string':
		switch (typeof(val1)) {
		case 'boolean':
			if (val1) {
				return (val2 == "1" || val2.toLowerCase() == "true" || val2.toLowerCase() == "on");
			} else {
				return (val2 == "0" || val2.toLowerCase() == "false" || val2.toLowerCase() == "off");
			}
			break;
		case 'string':
			if (val2 == "1" || val2.toLowerCase() == "true" || val2.toLowerCase() == "on") {
				return (val1 == "1" || val1.toLowerCase() == "true" || val1.toLowerCase() == "on");
			}
			if (val2 == "0" || val2.toLowerCase() == "false" || val2.toLowerCase() == "off") {
				return (val1 == "0" || val1.toLowerCase() == "false" || val1.toLowerCase() == "off");
			}
			return (val2 == val1);
		case 'number':
			if (val2 == "1" || val2.toLowerCase() == "true" || val2.toLowerCase() == "on") {
				return (val1 == 1);
			}
			if (val2 == "0" || val2.toLowerCase() == "false" || val2.toLowerCase() == "off") {
				return (val1 === 0);
			}
			return (val2 == val1 + "");
		}
		break;
	case 'number':
		switch (typeof(val1)) {
		case 'boolean':
			return (val1 * 1 == val2);
		case 'string':
			if (val1 == "1" || val1.toLowerCase() == "true" || val1.toLowerCase() == "on") {
				return (val2 == 1);
			}
			if (val1 == "0" || val1.toLowerCase() == "false" || val1.toLowerCase() == "off") {
				return (val2 === 0);
			}
			return (val1 == val2 + "");
		case 'number':
			return (val2 == val1);
		}
		break;
	default:
		return false;
	}
}

/*
 * reset_form()
 *	Reset a form with previously saved default values.
 *	Function skips elements with attribute: 'modified'= 'ignore'. 
 */
function reset_form(form_id)
{
	var df = document.forms[form_id];
	if (!df) {
		return;
	}
	if (df.getAttribute('saved') != "true") {
		return;
	}

	for (var i = 0, k = df.elements.length; i < k; i++) {
		var obj = df.elements[i];
		if (obj.getAttribute('modified') == 'ignore') {
			continue;
		}
		var name = obj.tagName.toLowerCase();
		var value;
		if (name == 'input') {
			var type = obj.type.toLowerCase();
			if ((type == 'text') || (type == 'textarea') || (type == 'password') || (type == 'hidden')) {
				obj.value = obj.getAttribute('default');
			} else if ((type == 'checkbox') || (type == 'radio')) {
				value = obj.getAttribute('default');
				switch (typeof(value)) {
				case 'boolean':
					obj.checked = value;
					break;
				case 'string':
					if (value == "1" || value.toLowerCase() == "true" || value.toLowerCase() == "on") {
						obj.checked = true;
					}
					if (value == "0" || value.toLowerCase() == "false" || value.toLowerCase() == "off") {
						obj.checked = false;
					}
					break;
				}
			}
		} else if (name == 'select') {
			var opt = obj.options;
			for (var j = 0; j < opt.length; j++) {
				value = obj[j].getAttribute('default');
				switch (typeof(value)) {
				case 'boolean':
					obj[j].selected = value;
					break;
				case 'string':
					if (value == "1" || value.toLowerCase() == "true" || value.toLowerCase() == "on") {
						obj[j].selected = true;
					}
					if (value == "0" || value.toLowerCase() == "false" || value.toLowerCase() == "off") {
						obj[j].selected = false;
					}
					break;
				}
			}
		}
	}
}

/*
 * is_number
 *	Return true if a value represents a number, else return false.
 */
function is_number(value)
{
	var str = value + "";
	return str.match(/^-?\d*\.?\d+$/) ? true : false;
}

var days = new Array(	"Sun", "Mon", "Tue", "Wed", "Thu", "Fri", "Sat" );				     						          						      
var days_in_month = ['31', '28', '31', '30', '31', '30', '31', '31', '30', '31', '30', '31'];


/*Add by Pan 2010,0828 //to parser singular password like "!!¡L!¡Ó$%&/()=?uoa" 
	It only used bin2hex.
*/
var _bin2hex = [   
    '0', '1', '2', '3', '4', '5', '6', '7',   
    '8', '9', 'a', 'b', 'c', 'd', 'e', 'f'  
];   
  
var _hex2bin = [   
     0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,    
     0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,    
     0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,   
     0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 0, 0, 0, 0, 0, 0, // 0-9   
     0,10,11,12,13,14,15, 0, 0, 0, 0, 0, 0, 0, 0, 0, // A-F   
     0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,   
     0,10,11,12,13,14,15, 0, 0, 0, 0, 0, 0, 0, 0, 0, // a-f   
     0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,   
     0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,   
     0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,   
     0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,   
     0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,   
     0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,   
     0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,   
     0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,   
     0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,   
];   
  
function bin2hex(str) {   
    var len = str.length;   
    var rv = '';   
    var i = 0;   
    var c;   
       
    while (len-- > 0) {   
        c = str.charCodeAt(i++);   
  
        rv += _bin2hex[(c & 0xf0) >> 4];   
        rv += _bin2hex[(c & 0x0f)];   
    }   
  
    return rv;   
}   
  
function hex2bin(str) {   
    var len = str.length;   
    var rv = '';   
    var i = 0;   
  
    var c1;   
    var c2;   
  
    while (len > 1) {   
        h1 = str.charAt(i++);   
        c1 = h1.charCodeAt(0);   
        h2 = str.charAt(i++);   
        c2 = h2.charCodeAt(0);   
           
        rv += String.fromCharCode((_hex2bin[c1] << 4) + _hex2bin[c2]);   
        len -= 2;   
    }   
  
    return rv;   
}

/*Add by Pan 2010,0917 //to check v6 address and v4. 
*/

// substr_count
function substr_count (haystack, needle, offset, length)
{
    var pos = 0, cnt = 0;

    haystack += '';
    needle += '';
    if (isNaN(offset)) {offset = 0;}
    if (isNaN(length)) {length = 0;}
    offset--;

    while ((offset = haystack.indexOf(needle, offset+1)) != -1){
        if (length > 0 && (offset+needle.length) > length){
            return false;
        } else{
            cnt++;
        }
    }

    return cnt;
}

// test_ipv4
// Test for a valid dotted IPv4 address

function test_ipv4(ip)
{
   var match = ip.match(/(([1-9]?[0-9]|1[0-9]{2}|2[0-4][0-9]|255[0-5])\.){3}([1-9]?[0-9]|1[0-9]{2}|2[0-4][0-9]|25[0-5])/);
   return match != null;
}

// test_ipv6
// Test if the input is a valid ipv6 address.

function test_ipv6(ip)
{
  // Test for empty address
  if (ip.length<3)
		return ip == "::";

  // Check if part is in IPv4 format
  if (ip.indexOf('.')>0)
  {
        lastcolon = ip.lastIndexOf(':');

        if (!(lastcolon && test_ipv4(ip.substr(lastcolon + 1))))
            return false;
        // replace IPv4 part with dummy
        ip = ip.substr(0, lastcolon) + ':0:0';
  } 

  // Check uncompressed
  if (ip.indexOf('::')<0)
  {
    var match = ip.match(/^(?:[a-f0-9]{1,4}:){7}[a-f0-9]{1,4}$/i);
    return match != null;
  }

  // Check colon-count for compressed format
  if (substr_count(ip, ':'))
  {
    var match = ip.match(/^(?::|(?:[a-f0-9]{1,4}:)+):(?:(?:[a-f0-9]{1,4}:)*[a-f0-9]{1,4})?$/i);
    return match != null;
  } 

  // Not a valid IPv6 address
  return false;
}

//check domain name Add by Pan 20101004
function checkDomain(nname)
{
var mai = nname;
var val = true;

var dot = mai.lastIndexOf(".");
var dname = mai.substring(0,dot);
var ext = mai.substring(dot,mai.length);
	
if(dot>2 && dot<57)
{
	for(var j=0; j<dname.length; j++)
	{
	  var dh = dname.charAt(j);
	  var hh = dh.charCodeAt(0);
	  if((hh > 47 && hh<59) || (hh > 64 && hh<91) || (hh > 96 && hh<123) || hh==45 || hh==46)
	  {
		 if((j==0 || j==dname.length-1) && hh == 45)	
	  	 {
	 	  	 alert("Domain name should not begin or end with '-'.");
		      return false;
	 	 }
	  }
	  else	{
	  	 alert("Your domain name should not have special characters.");
		 return false;
	  }
	}
}
else
{
 alert("Your Domain name is too short/long.");
 return false;
}	

return true;
}