var oForm = null;

$(document).ready(function() {
	oForm = document.forms["cfgform"];

	$(".error").css("display", "none").attr("visible", "0");

	$("#aStart").click(function () {
		var oError1 = $(".error1");
		var bError1 = isError1();
		if(bError1 && oError1.attr("visible")=="0") {
			oError1.slideDown("slow").attr("visible", "1");
		} else if(!bError1 && oError1.attr("visible")=="1") {
			oError1.slideUp("slow").attr("visible", "0");
		}
		if(!bError1) oForm.submit();
		return false;
	});

});

function isError1() {
	var nGroups = 0;
	$("#groups input").each(function(k, v) {
		if(v.checked) nGroups++;
	});
	return (nGroups==0);
}