function isURL(urlStr){if (urlStr.indexOf(" ")!=-1){alert("Spaces are not allowed in a URL");return false;}if(urlStr==""||urlStr==null){return false;}urlStr=urlStr.toLowerCase();var specialChars="\\(\\)><@,;:\\\\\\\"\\.\\[\\]";var validChars="\[^\\s" + specialChars + "\]";var atom=validChars + '+';var urlPat=/^http:\/\/(\w*)\.([\-\+a-z0-9]*)\.(\w*)/;var matchArray=urlStr.match(urlPat);if (matchArray==null){alert("The URL seems incorrect \ncheck it begins with http://\n and it has 2 .'s");return false;}var user=matchArray[2];var domain=matchArray[3];for (i=0; i<user.length; i++) {if (user.charCodeAt(i)>127) {alert("This domain contains invalid characters.");return false;}}for (i=0; i<domain.length; i++) {if (domain.charCodeAt(i)>127) {alert("This domain name contains invalid characters.");return false;}}var atomPat=new RegExp("^" + atom + "$");var domArr=domain.split(".");var len=domArr.length;for (i=0;i<len;i++) {if (domArr[i].search(atomPat)==-1) {alert("The domain name does not seem to be valid.");return false;}}if (domArr[domArr.length-1].length!=2 && domArr[domArr.length-1].search(knownDomsPat)==-1) {alert("The address must end in a well-known domain or two letter " + "country.");return false;}return true;}

	function Trim(TRIM_VALUE){
		if(TRIM_VALUE.length < 1){
		return"";
		}
		TRIM_VALUE = RTrim(TRIM_VALUE);
		TRIM_VALUE = LTrim(TRIM_VALUE);
		if(TRIM_VALUE==""){
		return "";
		}
		else{
		return TRIM_VALUE;
		}
		} //End Function
		
		function RTrim(VALUE){
		var w_space = String.fromCharCode(32);
		var v_length = VALUE.length;
		var strTemp = "";
		if(v_length < 0){
		return"";
		}
		var iTemp = v_length -1;
		
		while(iTemp > -1){
		if(VALUE.charAt(iTemp) == w_space){
		}
		else{
		strTemp = VALUE.substring(0,iTemp +1);
		break;
		}
		iTemp = iTemp-1;
		
		} //End While
		return strTemp;
		
		} //End Function
		
		function LTrim(VALUE){
		var w_space = String.fromCharCode(32);
		if(v_length < 1){
		return"";
		}
		var v_length = VALUE.length;
		var strTemp = "";
		
		var iTemp = 0;
		
		while(iTemp < v_length){
		if(VALUE.charAt(iTemp) == w_space){
		}
		else{
		strTemp = VALUE.substring(iTemp,v_length);
		break;
		}
		iTemp = iTemp + 1;
		} //End While
		return strTemp;
	} //End Function
//
		function isInteger(s)
		{ 
			var i;
			for (i = 0; i < s.length; i++)
			{   
			// Check that current character is number.
			var c = s.charAt(i);
			if (((c < "0") || (c > "9"))) return false;
			}
			// All characters are numbers.
			return true;
		}
//
	function isEmail(string) {
		if (string.search(/^\w+((-\w+)|(\.\w+))*\@[A-Za-z0-9]+((\.|-)[A-Za-z0-9]+)*\.[A-Za-z0-9]+$/) != -1) {
		return true;
		} else {
		//alert("Invalid Email Address.");
		return false;
		}

		function ValidateEmail(email) 
		{
			var strValidChars = "0123456789abcdefghijklmnopqrstuvwxyz_@.";
			var strCheck;
			for (i = 0; i < email.length; i++)
			{
				strCheck = email.charAt(i);
				if (strValidChars.indexOf(strCheck) == -1) 
				{
					alert("Enter valid email characters");
					return false; 
				}
			}
			strCheck="@";
			if (email.indexOf(strCheck) == -1)
			{
				alert("Email must contain an @ symbol");
				return false;
			}
			if(email.indexOf(strCheck) > 1)
			{
				alert("Email must contain only one @ symbol");
				return false;
			}
			return true; 
		}
	}