// Declaring required variables
	var digits = "0123456789";
	// non-digit characters which are allowed in phone numbers
	var phoneNumberDelimiters = "()- ";
	// characters which are allowed in international phone numbers
	// (a leading + is OK)
	var validWorldPhoneChars = phoneNumberDelimiters + "+";
	// Minimum no of digits in an international phone no.
	var minDigitsInIPhoneNumber = 10;

	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 trim(s){
		var i;
	    var returnString = "";
	    // Search through string's characters one by one.
	    // If character is not a whitespace, append to returnString.
	    for (i = 0; i < s.length; i++) {   
	        // Check that current character isn't whitespace.
	        var c = s.charAt(i);
	        if (c != " ") returnString += c;
	    }
	    return returnString;
	}
	function stripCharsInBag(s, bag){
		var i;
	    var returnString = "";
	    // Search through string's characters one by one.
	    // If character is not in bag, append to returnString.
	    for (i = 0; i < s.length; i++) {   
	        // Check that current character isn't whitespace.
	        var c = s.charAt(i);
	        if (bag.indexOf(c) == -1) returnString += c;
	    }
	    return returnString;
	}

	function checkInternationalPhone(strPhone){
	var bracket=3
	strPhone=trim(strPhone)
	if(strPhone.indexOf("+")>1) return false
	if(strPhone.indexOf("-")!=-1)bracket=bracket+1
	if(strPhone.indexOf("(")!=-1 && strPhone.indexOf("(")>bracket)return false
	var brchr=strPhone.indexOf("(")
	if(strPhone.indexOf("(")!=-1 && strPhone.charAt(brchr+2)!=")")return false
	if(strPhone.indexOf("(")==-1 && strPhone.indexOf(")")!=-1)return false
	s=stripCharsInBag(strPhone,validWorldPhoneChars);
	return (isInteger(s) && s.length >= minDigitsInIPhoneNumber);
	}

	function isEmpty(aTextField) {
		var rtn = aTextField.value;
		if((rtn==null)||(typeof(rtn)!='string')||!rtn.length){
			 rtn='';
		}else{
			rtn = rtn.replace(/^\s+/,'').replace(/\s+$/,'') ;
		}
		
		if ((rtn.length==0) || (rtn==null)) {
			return true;
		}else { 
			return false; 
		}
	}

	function emailCheck(str) {
		var at="@"
		var dot="."
		var lat=str.indexOf(at)
		var lstr=str.length
		var ldot=str.indexOf(dot)
		if (str.indexOf(at)==-1){	   
		   return false
		}
		if (str.indexOf(at)==-1 || str.indexOf(at)==0 || str.indexOf(at)==lstr){	   
		   return false
		}
		if (str.indexOf(dot)==-1 || str.indexOf(dot)==0 || str.indexOf(dot)==lstr){
		    return false
		}
		 if (str.indexOf(at,(lat+1))!=-1){
		    return false
		 }
		 if (str.substring(lat-1,lat)==dot || str.substring(lat+1,lat+2)==dot){
		    return false
		 }
		 if (str.indexOf(dot,(lat+2))==-1){	    
		    return false
		 }
		 if (str.indexOf(" ")!=-1){
		    return false
		 }
			 return true					
	}	

	function checktime(thetime) {
		var a,b,c,f,err=0;
		a=thetime.value;
		if (a.length != 5) err=1;
		b = a.substring(0, 2);
		c = a.substring(2, 3); 
		f = a.substring(3, 5); 
		if (/\D/g.test(b)) err=1; //not a number
		if (/\D/g.test(f)) err=1; 
		if (b<0 || b>23) err=1;
		if (f<0 || f>59) err=1;
		if (c != ':') err=1;
		if (err==1) return false;
		return true;
	}
	
		function imposeMaxLength(Object, MaxLen){
		  		return (Object.value.length <= MaxLen);
	}
	function isNumeric(strString) {
	   var strValidChars = "0123456789.-";
	   var strChar;
	   var blnResult = true;

	   if (strString.length == 0) return false;
	   for (i = 0; i < strString.length && blnResult == true; i++)
	      {
	      strChar = strString.charAt(i);
	      if (strValidChars.indexOf(strChar) == -1)
	         {
	         blnResult = false;
	         }
	      }
	   return blnResult;
	   }