function emailCheck(obj)
{
	var emailfilter=/^\w+[\+\.\w-]*@([\w-]+\.)*\w+[\w-]*\.([a-z]{2,4}|\d+)$/i
	var returnval=emailfilter.test(obj.value);
	return returnval;
}

function validate_form()
{
	var name=document.getElementById('name');
	var email=document.getElementById('email');
	var comment=document.getElementById('comment');
	
	if( (name.value=='Your Name') || (name.value.search(/\S/)==-1)) {
		alert("Please enter your Name.");
		name.focus();
		return false;
	}	
	
	if( (email.value=='Your E-mail Address') || (email.value.search(/\S/)==-1)) {
		
		alert("Please enter your Email ID.");
		email.focus();
		return false;
	}
	else
	 {
		getResult=emailCheck(email);
		if(getResult==false)
			{
				alert("Please enter a valid Email ID.");
				email.focus();
				return false;
			}
	 }
	 if( (comment.value=='Put your question here') || (comment.value.search(/\S/)==-1)) {
		alert("Please enter your Question.");
		comment.focus();
		return false;
	}
	 return true;	
}