function validate()
{ 
	if(document.form.name.value == "")
		{
		alert("Please enter your name");
		document.form.name.focus();
		return false;
		}
	
	if(document.form.email.value == "")
 	{
		alert("Please enter  your Email");
		document.form.email.focus();
		return false;
	}
	

	if(document.form.email.value != "")
 	{
		 var reg = /^([A-Za-z0-9_\-\.])+\@([A-Za-z0-9_\-\.])+\.([A-Za-z]{2,4})$/;
   		var address = document.form.email.value;
		
  		 if(reg.test(address) == false)
		{
        alert('Invalid Email Address');
		document.form.email.focus();
        return false;
   		}

	 }
			
	if(document.form.message.value == "")
		{
		alert("Please enter your message");
		document.form.message.focus();
		return false;
		}
}