function validateform()
{
	var fieldname='';
	var msg='';
	if(document.getElementById('firstname').value=="")
	{
		msg="First Name \n";
		fieldname="firstname";
	}
	if(document.getElementById('lastname').value=="")
	{
		msg+="Last Name \n";
		if(fieldname=='')
		fieldname="lastname";
	}
	if(document.getElementById('email').value=="")
	{
		msg+="Email \n";
		if(fieldname=='')
		fieldname="email";
	}
	if(document.getElementById('email').value!="")
	{
		if(!(checkemail('email')))
		{
			msg="Valid Email \n";
			if(fieldname=='')
			fieldname="email";
		}
	}
	if(msg!='')
	{
		alert("Please enter the following fields \n \n"+msg);
		document.getElementById(fieldname).focus();
		return false;
	}
	
}
function checkemail(email)
{
	var val=document.getElementById(email).value;
	var regex = /^[a-zA-Z]{1}[a-zA-Z0-9._-]+@([a-zA-Z0-9.-]+\.)+[a-zA-Z0-9.-]{2,4}$/;
	if(regex.test(val)==0)
	{
		return false;
	}
	else
	return true;
}