js post下载相当于 location.href

 1 ?????/** 2 ????*参数说明： url：下载地址，val:需要提交的参数值，具体类型和个数自行扩展 3 ????* 参数可以用obj = {url:""",val1:"111",val2:"222",...}这样的 格式，也可以用(url,val1,val2....)根据自己喜好来 4 ????*/ 5 ????????function ajaxPostLoadFile(url,val){ 6 ????????????var form = $("<form>");//定义一个form表单 7 ????????????form.attr("id", "downloadform"); 8 ????????????form.attr("style", "display:none");//将表单隐藏 9 ????????????form.attr("target", "");10 ????????????form.attr("method", "post");11 ????????????form.attr("action", url);12 13 ????????????var input1 = $("<input>");14 ????????????input1.attr("type", "hidden");15 ????????????input1.attr("name", "key"); 16 ????????????input1.attr("value", val);17 ????????????//如果有多个参数，参照上面input1 的写法18 19 ????????????form.append(input1);//一定要把参数添加到form里20 ????????????$("body").append(form);//将表单放置在页面中21 ????????????form.submit();//表单提交22 ????????????$("#downloadform").remove();//移除表单23 ????????}