function checkcontact(f) {

	 	if(f.contact_name.value == "" || f.contact_name.value == "Name: ") {
			alert('Please enter Name');
			f.contact_name.focus();
			return false;
		}
		
		var emailvalue = f.contact_email.value;
		var filter = /^([a-zA-Z0-9_.-])+@(([a-zA-Z0-9-])+.)+([a-zA-Z0-9]{2,4})+$/;
	 	if (!filter.test(emailvalue)) {
			alert('Please enter a valid Email');
			f.contact_email.focus();
			return false;
		}
		
		if(f.contact_phone.value == "" || f.contact_phone.value == "Phone: ") {
			alert('Please Enter Phone Number');
			f.contact_phone.focus();
			return false;
		}
		
		if(f.contact_message.value == "" || f.contact_message.value == "Message: ") {
			alert('Please enter Message');
			f.contact_message.focus();
			return false;
		}

		return true;
}