code:
var html = [];
for(int i=0;i<data.length;i++){
html.push($.format('<a class="list-group-item" iid="{0}">{1}【{0}】{2}<font color=orange>({3})</font></a>', data[i].ItemId, icon, data[i].ItemName, data[i].ProductName));
}
$("#div1").val(html.join(''));//数组连接起来,一次赋值,不用频繁操作dom