function validDigits(ElementValue){
	var digits="0123456789.";
	var frmElement=ElementValue;
	var temp;
	for(var i=0;i<frmElement.length;i++){
		temp=frmElement.substring(i,i+1);
		if(digits.indexOf(temp)==-1){
			return (false);
		}
	}
	return (true);
}

function validCharacters(ElementValue){
	var digits="ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789@_.";
	var frmElement=ElementValue;
	var temp;
	for(var i=0;i<frmElement.length;i++){
		temp=frmElement.substring(i,i+1);
		if(digits.indexOf(temp)==-1){
			return (false);
		}
	}
	return (true);
}

/*function for checking blank fields*/
function IsBlank(ElementValue){
	
	var frmElement=ElementValue;
	var temp;
	var countSpace=0;
	for(var i=0;i<frmElement.length;i++){
		temp=frmElement.substring(i,i+1);
		if(temp.indexOf(" ")!=-1){
			countSpace++;
		}
	}
	if (countSpace==frmElement.length)
		return (false);
	
	return (true);
}

/*function for checking Email address*/
function IsEmailValid(ElementValue)
	{
	
	
	var EmailOk  = true;
	var Temp     = ElementValue;
	var AtSym    = Temp.indexOf('@');
	var Period   = Temp.lastIndexOf('.');
	var Space    = Temp.indexOf(' ');
	var Dot      = Temp.indexOf('.');
	var Length   = Temp.length - 1;   // Array is from 0 to length-1

	if ((AtSym < 1) ||                     // '@' cannot be in first position
	    (Period <= AtSym+1) ||             // Must be atleast one valid char btwn '@' and '.'
	    (Period == Length ) ||             // Must be atleast one valid char after '.'
	    (Space  != -1)      ||              // No empty spaces permitted
	    (Dot ==0 )          ||            // No Dot on first position permitted
	    (Dot+1 ==AtSym ))                      // No Dot on first position permitted
	   {  
	      EmailOk = false;
	   }
	return EmailOk;
}

function changeColor(d){

	d.backgroundcolor="red";
}

function new_window(url){
		   
		   link= window.open(url,"link","toolbar=0,location=0,directories=0,status=0,menubar=0,scrollbars=1,resizable=1,width=700,height=600,left=100,top=30" );
		   		   
		   }

function toggleLayer (layer, img)
{

 if ( document.getElementById(layer).style.visibility == "" || document.getElementById(layer).style.visibility == 'visible')
 {
  	hideLayer (layer, img)
 }
 else 
 {
  	showLayer (layer, img)
 }

}

function hideLayer (layerName, img)
{
			document.getElementById(layerName).style.visibility = "hidden";
			document.getElementById(layerName).style.display = "none";			
			img.src='../images/plus.gif';
}
function showLayer (layerName, img)
{

 			document.getElementById(layerName).style.visibility = "visible";
			document.getElementById(layerName).style.display = "block";						
			img.src='../images/minus.gif';
}