function showResponse()
{
	if (xmlhttp1.readyState == 4) 
	{

		   var result = xmlhttp1.responseText;
		   //alert(result);
		   if (result == 'true')
		   	alert('Your Email has been added successfully');
		   else alert('Sorry, Your Email can not be inserted');
	}
	
}

function callAddMailFun(email)
{
	var email = document.getElementById('emailadd').value;
	if(email!='') {
		if(is_invalid_email(email)==true){
			message1 ="Please enter a valid email address\n"  ;
			return;
	}
	}
	addMailAjaxFun(email);
	
}
function is_invalid_email(str)  //check for valid email
{
	var at="@";
	var dot=".";
	var lat=str.indexOf(at);
	var lstr=str.length;
	var ldot=str.indexOf(dot);
	var b_error = false;
	if (str.indexOf(at)==-1){
			b_error = true;
	}
	else if (str.indexOf(at)==-1 || str.indexOf(at)==0 || str.indexOf(at)==lstr){
			b_error = true;
	}
	else if (str.indexOf(dot)==-1 || str.indexOf(dot)==0 || str.indexOf(dot)==lstr){
	b_error = true;
	}
	else if (str.indexOf(at,(lat+1))!=-1){
		b_error = true;
	}
	else if (str.substring(lat-1,lat)==dot || str.substring(lat+1,lat+2)==dot){
			b_error = true;
	}

	else if (str.indexOf(dot,(lat+2))==-1){
		b_error = true;
	}
	if (str.indexOf(" ")!=-1){
			b_error = true;
	}
	return b_error;
}