'clickfu':function (to) {
//回調(diào)函數(shù)，to為點擊對象
to.setAttribute("class","cur");
var siblings = to.parentNode.childNodes;
for (var i = 0; i < siblings.length; i++){
if (siblings[i].nodeType == 1 && siblings[i] != to){
siblings[i].className = '';
}
}
}
