function ltrim (s){
		return s.replace(/^\s*/, "")
	}
	
	function rtrim (s){
		return s.replace(/\s*$/, "");
	}
	
	function trim (s){
		return rtrim(ltrim(s));
	}
	
	function checkEmail(str){
		if(isRecentBrowser()==true){
			var testresults=false;
			var filter=/^[a-zA-Z0-9._-]+@([a-zA-Z0-9.-]+\.)+[a-zA-Z0-9.-]{2,4}$/;
			
			if (filter.test(str)){
				testresults=true
			}
			return testresults;
		}else{
			return true;
		}
	}
	
	function isRecentBrowser(){
		if (document.layers||document.getElementById||document.all){
			return true;
		}else{
			return false;
		}
	}
			
	function isValidUrl(externalURL){
       var j = new RegExp(); 
       j.compile("^[A-Za-z]+://[A-Za-z0-9-]+\.[A-Za-z0-9]+"); 
       return j.test(externalURL);
	}
	
	function filterDigits(digit){
		var validChar = true;
		if (window.event.keyCode<48 || window.event.keyCode >57) {
			validChar = false;
		} 
   		return validChar;
	}

	// Declaring valid date character, minimum year and maximum year
	var dtCh= "/";
	var minYear=1900;
	var maxYear=2100;

	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 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++){   
	        var c = s.charAt(i);
	        if (bag.indexOf(c) == -1) returnString += c;
	    }
	    return returnString;
	}

	function daysInFebruary (year){
		// February has 29 days in any year evenly divisible by four,
	    // EXCEPT for centurial years which are not also divisible by 400.
	    return (((year % 4 == 0) && ( (!(year % 100 == 0)) || (year % 400 == 0))) ? 29 : 28 );
	}
	function DaysArray(n) {
		for (var i = 1; i <= n; i++) {
			this[i] = 31
			if (i==4 || i==6 || i==9 || i==11) {this[i] = 30}
			if (i==2) {this[i] = 29}
	   } 
	   return this
	}

	//validate for dd/mm/yyyy
	function isDate(dtStr){
		var daysInMonth = DaysArray(12)
		var pos1=dtStr.indexOf(dtCh)
		var pos2=dtStr.indexOf(dtCh,pos1+1)
		var strDay=dtStr.substring(0,pos1)
		var strMonth=dtStr.substring(pos1+1,pos2)
		var strYear=dtStr.substring(pos2+1)
		strYr=strYear
		if (strDay.charAt(0)=="0" && strDay.length>1) strDay=strDay.substring(1)
		if (strMonth.charAt(0)=="0" && strMonth.length>1) strMonth=strMonth.substring(1)
		for (var i = 1; i <= 3; i++) {
			if (strYr.charAt(0)=="0" && strYr.length>1) strYr=strYr.substring(1)
		}
		month=parseInt(strMonth)
		day=parseInt(strDay)
		year=parseInt(strYr)
		if (pos1==-1 || pos2==-1){
			//alert("The date format should be : dd/mm/yyyy")
			return 1
		}
		if (strMonth.length<1 || month<1 || month>12){
			//alert("Please enter a valid month")
			return 2
		}
		if (strDay.length<1 || day<1 || day>31 || (month==2 && day>daysInFebruary(year)) || day > daysInMonth[month]){
			//alert("Please enter a valid day")
			return 3
		}
		if (strYear.length != 4 || year==0 || year<minYear || year>maxYear){
			//alert("Please enter a valid 4 digit year between "+minYear+" and "+maxYear)
			return 4
		}
		if (dtStr.indexOf(dtCh,pos2+1)!=-1 || isInteger(stripCharsInBag(dtStr, dtCh))==false){
			//alert("Please enter a valid date")
			return 5
		}
	return 0
	}

	function openUploader(textFieldName, lang){
		var leftPos = (screen.availWidth-400) / 2;
		var topPos = (screen.availHeight-370) / 2;
		window.open('/gb/includes/df_upload.asp?lang='+lang+'&f=' + textFieldName,'','width=400,height=370,scrollbars=no,resizable=no,titlebar=0,top=' + topPos + ',left=' + leftPos);
	}
	
	function removeUpload(textFieldName, lang){
		var leftPos = (screen.availWidth-400) / 2;
		var topPos = (screen.availHeight-370) / 2;
		window.open('/gb/includes/df_remove.asp?remove=1&lang='+lang+'&f=' + textFieldName.value,'','width=400,height=370,scrollbars=no,resizable=no,titlebar=0,top=' + topPos + ',left=' + leftPos);
		textFieldName.value = '';
	}