function setLayerDisplay(whichLayer,displayStyle)
{
		displayStyle=trim(displayStyle);
		
		if (document.getElementById)
		{
			// this is the way the standards work
			if (document.getElementById(whichLayer)) {
				var style2 = document.getElementById(whichLayer).style;
				style2.display = displayStyle;
			}
		}
		else if (document.all)
		{
			// this is the way old msie versions work
			if (document.all[whichLayer]) {
				var style2 = document.all[whichLayer].style;
				style2.display =displayStyle;
			}
		}
		else if (document.layers)
		{
			if (document.layers[whichLayer]) {
				// this is the way nn4 works
				var style2 = document.layers[whichLayer].style;
				style2.display = displayStyle;
			}
		}
}


// Removes leading whitespaces
function LTrim( value ) {
	
	var re = /\s*((\S+\s*)*)/;
	return value.replace(re, "$1");
	
}

// Removes ending whitespaces
function RTrim( value ) {
	
	var re = /((\s*\S+)*)\s*/;
	return value.replace(re, "$1");
	
}

// Removes leading and ending whitespaces
function trim( value ) {
	
	return LTrim(RTrim(value));
	
}

function validatenotblank (form,control,compare,text)
{
	
		
  		if (trim(control.value) == compare) {
   		 alert( text );
  		  control.focus();
			//control.style.background='#0e0';
   		 return true ;
  		}
		

	return false ;
}


function validatethesame (form,control,compare,text)
{
  if (control.value != compare.value) {
    alert( text );
    control.focus();
	//control.style.background='#0e0';
    return true ;
  }
  return false ;
  
}


function telephoneOnly(myevent)
{
	
	if ( (myevent.keyCode < 40 || myevent.keyCode > 57) && myevent.keyCode!=32) {
		//alert ("Numbers only in this field please");
		return false;
	}
	
	return true;
	
}


function openWindow(theURL, Name, popW, popH, scroll, resize) { 
	var winleft = (screen.width - popW) / 2;
	var winUp = (screen.height - popH) / 2;
	winProp = 'width='+popW+',height='+popH+',left='+winleft+',top='+winUp+',scrollbars='+scroll+',resizable='+resize+',status=yes';
	Win = window.open(theURL, Name, winProp);
	Win.window.focus();
}

function openFlashDemoWindow(demoName) {
	openWindow('/flash/'+demoName+'/', 'AtegrityTRACEDemonstration', 700, 500, 'yes', 'no');
}

function openHelpWindow(theurl) {
	openWindow(theurl, 'Help', 500, 300, 'yes', 'no');
}


function OpenEmailToFriendWindow(myurl) { 
	openWindow('emailtofriend.asp?url='+myurl, 'EmailToFriend',350, 100, 'no', 'no');
}

/**
 * DHTML date validation script for dd/mm/yyyy. Courtesy of SmartWebby.com (http://www.smartwebby.com/dhtml/)
 */
// 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
}

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)
	
	if (dtStr.replace(/^\s*|\s*$/g,"")=="") return true
	
	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 false
	}
	if (strMonth.length<1 || month<1 || month>12){
		alert("Please enter a valid month")
		return false
	}
	if (strDay.length<1 || day<1 || day>31 || (month==2 && day>daysInFebruary(year)) || day > daysInMonth[month]){
		alert("Please enter a valid day")
		return false
	}
	if (strYear.length != 4 || year==0 || year<minYear || year>maxYear){
		alert("Please enter a valid 4 digit year between "+minYear+" and "+maxYear)
		return false
	}
	if (dtStr.indexOf(dtCh,pos2+1)!=-1 || isInteger(stripCharsInBag(dtStr, dtCh))==false){
		alert("Please enter a valid date")
		return false
	}
return true
}