function ValidateForm(f){

	with(f){
		if (isEmpty(_1_Name.value)) {
			alert("Please enter your Name");
			_1_Name.focus();
			return false;
		}
	
		if (isEmpty(_2_Email_From.value)) {
			alert("Please enter your Email Address");
			_2_Email_From.focus();
			return false;
		}
		
		if ( !isEmail(_2_Email_From.value) ) {
			alert("Please enter a valid Email Address.");
			_2_Email_From.focus();
			return false;
		}
		if (isEmpty(_3_Phone.value)) {
			alert("Please enter your Phone Number");
			_3_Phone.focus();
			return false;
		}
		if (isEmpty(_4_Comments.value)) {
			alert("Please enter your Comments / Enquiries");
			_4_Comments.focus();
			return false;
		}		
	}
	return true;
	
}