function checkrequired(which) {

var pass = true;
var num_chars = 9;

if (document.images) {

	for (i = 0; i < which.length; i ++) {
	var tempobj = which.elements[i];

		if (tempobj.name.substring(0,num_chars) == "required_") {
			if (((tempobj.type == "text" || tempobj.type == "textarea" || tempobj.type == "password") &&
				tempobj.value == '') || (tempobj.type.toString().charAt(0) == "s" &&
				tempobj.selectedIndex == 0)) {
				pass = false;
				break;
      }
    }
  }
}

if (!pass) {
	shortFieldName = tempobj.name.substring(num_chars,30).toUpperCase();
	alert("Please enter a value in the " + shortFieldName + " field.");
	return false;
}
else
	return true;
}