//#信用卡比一比表单提交
function checkfrm(){
	compare1=$("select[@name='compare1'] option[@selected]").val();
	compare2=$("select[@name='compare2'] option[@selected]").val();
	compare3=$("select[@name='compare3'] option[@selected]").val();
	if(compare1=="" && compare2=="" && compare3=="" ){
		alert("您至少要选择一项！");
		return false;
	}else{
		document.cardscompare.submit();
		return true;
	}
}