function validfields() {

	var strEmail;

	if (document.form.FirstName.value=="")
	{
		alert("Please enter your First Name");
			return false;
	}
	
	if (document.form.LastName.value=="")
	{
		alert("Please enter your Last Name");
			return false;
	} 

	if (document.form.Email.value=="")
	{
		alert("Please enter your Email Address");
			return false;
	}
	
	if (document.form.Subject.value=="")
	{
		alert("Please enter a Subject");
			return false;
	}
	
	if (document.form.Message.value=="")
	{
		alert("Please enter a Message");
			return false;
	}
	
	else
	
	{
		stremail = document.form.Email.value
		if (stremail.indexOf("@")== -1) 	
		{		
			alert('Please enter a valid Email Address.');
			return false;
		}
		else if (stremail.indexOf(".",stremail.indexOf("@"))== -1) 	
		{		alert('Please enter a valid Email Address.');
			return false;
		}
		else if (stremail.indexOf(".",stremail.indexOf("@"))>= stremail.length-1) 
		{		
			alert('Please enter a valid Email Address.');
			return false;
		}
	}
	return true;	
}