var errors = 0;

function checkForm() {
	errors = 0;
	$$("form.submit_form input,form.submit_form textarea").each(function(el) {
		if (el.value == "" && el.getAttribute("type") != "file") {
			el.setStyle({ background: "#FFFFCC" });
			errors++;
		} else {
			if (el.name)
				el.setStyle({ background: "#FFFFFF" });
		}
	});
	if (errors > 0) {
		alert("Please fill in the marked fields.  All fields are required.");
		return false;
	}
}