jsp js iframe用post方式提交大数据

<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
<html>
 <head>
  <title> New Document </title>
  <meta name="Generator" content="EditPlus">
  <meta name="Author" content="">
  <meta name="Keywords" content="">
  <meta name="Description" content="">
  <script>
var url = 'http://localhost:8080/test/myTest.jsp';
var bigData = '此处为大数据';
var html = '<form action="'+url+'" method="post" target="_self" id="postData_form">'+
           '<input id="bigData" name="bigData" type="hidden" value="'+bigData+'"/>'+
           '</form>';

document.getElementById('myIFrame').contentWindow.document.wirte(html);
document.getElementById('myIFrame').contentWindow.document.getElementById('postData_form').submit();


  </script>
 </head>

 <body>
  <iframe id="myIFrame"  src="about:blank"  width="100%" height="200px" noresize>

  </iframe>
 </body>
</html>


iframe的src,默认是get方式提交,这次遇到参数特别多,get方式提交报错了,改为post提交.

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