var alertColor = "#FFFFCC";

function IsBlank(s) {
	for(var i = 0; i < s.length; i++) {
		var c = s.charAt(i);
		if ((c != ' ') && (c != '\n') && (c != '\t')) {
			return false;
		}
	}
	return true;
}

function TextField_NotNull(obj) {
	var s = obj.value;
	if (IsBlank(s) || s == null) {
		obj.style.backgroundColor = alertColor;
		return 1;
	} else {
		obj.style.backgroundColor = "";
		return 0;
	}
}

function DropDownList_Selected(obj) {
	var s = obj.value;
	if (s == -1) {
		obj.style.backgroundColor = alertColor;
		return 1;
	} else {
		obj.style.backgroundColor = "";
		return 0;
	}
}

function RadioBox_Selected(objName) {
	var s = document.getElementsByName(objName);
	for (var i = 0; i < s.length; i++) {
		if (s[i].checked) {
			return 0;
		}
	}
	return 1;
}