var d = document;

function rTrim(sString)
{
	while (sString.substring(sString.length-1, sString.length) == ' ')
	{
	sString = sString.substring(0,sString.length-1);
	}
	return sString;
}

function lTrim(sString)
{
	while (sString.substring(0,1) == ' ')
	{
	sString = sString.substring(1, sString.length);
	}
	return sString;
}

function Trim( sString )
{
	return lTrim( rTrim(sString) );
}

function isEmpty( ele )
{
	if( Trim(ele) == "" || undefined || null )
		return true;	
	return false;
}

function isEmailValid(str) 
{
		var at="@"
		var dot="."
		var lat=str.indexOf(at)
		var lstr=str.length
		var ldot=str.indexOf(dot)
		if (str.indexOf(at)==-1){
		   //alert("Invalid E-mail ID")
		   return false
		}

		if (str.indexOf(at)==-1 || str.indexOf(at)==0 || str.indexOf(at)==lstr){
		   //alert("Invalid E-mail ID")
		   return false
		}

		if (str.indexOf(dot)==-1 || str.indexOf(dot)==0 || str.indexOf(dot)==lstr){
		    //alert("Invalid E-mail ID")
		    return false
		}

		 if (str.indexOf(at,(lat+1))!=-1){
		    alert("Invalid E-mail ID")
		    return false
		 }

		 if (str.substring(lat-1,lat)==dot || str.substring(lat+1,lat+2)==dot){
		    //alert("Invalid E-mail ID")
		    return false
		 }

		 if (str.indexOf(dot,(lat+2))==-1){
		    //alert("Invalid E-mail ID")
		    return false
		 }
		
		 if (str.indexOf(" ")!=-1){
		    //alert("Invalid E-mail ID")
		    return false
		 }

 		 return true					
}

function void_()
{
	return;
}

/*********************************************************/
function addToNewsLetter()
{
	var frm = document.newsletter;
	if( isEmailValid(frm.email.value) )
	{
		getPage( "add_to_newsletter.php?email=" + frm.email.value, "newsLetterMsg" )
	}
	else
	{
		document.getElementById("newsLetterMsg").innerHTML = "Invalid E-mail Address!!!";	
		if(nTimer==null)
		{
			nTimer = setInterval("clearNewsLetterText()", 2500);
		}
	}
	
	return false;
}