javascript学习指南_Javascript利用iframe框架实现文件上传

js

<script>
$(document).ready(function()
{

//获取返回的document
function getDoc(frame) {
     var doc = null;

     // IE8 cascading access check
     try {
         if (frame.contentWindow) {
             doc = frame.contentWindow.document;
         }
     } catch(err) {
     }

     if (doc) { // successful getting content
         return doc;
     }

     try { // simply checking may throw in ie8 under ssl or mismatched protocol
         doc = frame.contentDocument ? frame.contentDocument : frame.document;
     } catch(err) {
         // last attempt
         doc = frame.document;
     }
     return doc;
 }

function postToIframe(formObj,callback){
    $("#multi-msg").html("");
    var formURL = formObj.attr("action");

    //生成随机id
    var  iframeId = "unique" + (new Date().getTime());

    //生成空白的iframe
    var iframe = $("

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