(function(){
var productUl = document.getElementById("product_ul");
var productLi = productUl.getElementsByTagName("li");
var listul = document.getElementById("productUl");
var listli = listul.getElementsByTagName("li");
var pheight = document.getElementById("product_product");
function productDh(dj){
for(var i=0;i<productLi.length;i++){
productLi[i].className = "";
}
productLi[dj].className = "producton";
}
for(var j=0;j<productLi.length;j++){
productLi[j].index = j;
productLi[j].onclick = function(){
productDh(this.index);
}
}
for(var i=0;i<productLi.length;i++){
var a;
var h = pheight.offsetHeight;
productLi[i].addEventListener("click",function(){
for(var j=0;j<listli.length;j++){
console.log(listli[j].offsetTop-h)//这里后台能够显示每一个数值
window.scrollTo(0,listli[j].offsetTop -h);//这里却实现不了,没有数值!
}
});
}
}());