function selectAll(obj)	{
	var f = obj.form;
	var i, elm
	for (i=0; i<f.elements.length; i++) {
		elm = f.elements[i];
		if (elm.type == "checkbox" && elm.name.substr(0, obj.name.length+1) == obj.name + "s") {
			elm.checked = obj.checked;
		}
	}
}
//Check if any key selected // PHP
function keySelected(f) {
	if (!f.elements["ids[]"]) return false;
	if (f.elements["ids[]"][0]) {
		for (var i=0; i<f.elements["ids[]"].length; i++)
			if (f.elements["ids[]"][i].checked) return true;
	} else {
		return f.elements["ids[]"].checked;
	}
	return false;
}