$(document).ready(function(){
    $("img.lazy").each(function(){
        src = $(this).attr("data-src");
        $(this).attr("src",src);
    });
});
function doPost(to, p) { // to:提交动作（action）,p:参数
    var myForm = document.createElement("form");
    myForm.method = "post";
    myForm.action = to;
    for (var i in p){
        var myInput = document.createElement("input");
        myInput.setAttribute("name", i); // 为input对象设置name
        myInput.setAttribute("value", p[i]); // 为input对象设置value
        myForm.appendChild(myInput);
    }
    document.body.appendChild(myForm);
    myForm.submit();
    document.body.removeChild(myForm); // 提交后移除创建的form
}