js跨域post请求

 1 function funPostBack(srvMethod){
 2         /*
 3         var contentNR=$(document.getElementById("reportFrame").contentWindow.document).find("#content-container").html();
 4          contentNR=$("#x").text(contentNR).html();
 5         contentNR=contentNR.substring(0,400000);
 6         if(exec_obj==null){
 7             exec_obj = document.createElement('iframe');
 8             exec_obj.name = 'tmp_frame';
 9             exec_obj.src = postbackUrl+"?parms="+contentNR;
10             exec_obj.style.display = 'none';
11             document.body.appendChild(exec_obj);
12         }else{
13             exec_obj.src = postbackUrl+"?parms="+contentNR;
14         }*/
15         
16         var contentNR=$(document.getElementById("reportFrame").contentWindow.document).find("#content-container div.pageContentDIV.contentDIV").html();
17         if(document.getElementById("SMAL")!=null)
18         {
19             document.getElementById("SMAL").remove();//首先删除
20         }
21         var form ="<form action='"+postbackUrl+"' method='post'>" +
22                 "<input type='hidden' name='parms' value=''/> " +
23                 "<input type='hidden' name='srvMethod' value=''/> " +
24                 "</form> ";
25         $("body").append("<iframe id='SMAL' name='SMAL' style='display: none'></iframe>");//载入iframe
26         $( "#SMAL" ).contents().find('body').html(form);//将form表单塞入iframe;
27         $( "#SMAL" ).contents().find("form input[name='parms']").val(contentNR);        
28         $( "#SMAL" ).contents().find("form input[name='method']").val(srvMethod);
29         $( "#SMAL" ).contents().find('form').submit();
30     }