function validate_form(){
	valid = true;
	var warning = "";
        if ( document.contactForm.name.value == "")
        {
                warning += "Please fill in the 'Name' field.\n";
                valid = false;
        }
		if ( document.contactForm.phone.value == "")
        {
                warning += "Please enter your phone #.\n";
                valid = false;
        }
		if ( document.contactForm.email.value == "")
        {
                warning += "Please enter a valid email address.\n";
                valid = false;
        }
		if ( document.contactForm.message.value == "")
        {
                warning += "Please fill in the comments.\n";
                valid = false;
        }
		if(warning != ""){
			alert(warning);
		}
        return valid;
}