js动态生成Html元素实现Post操作（createElement）

<form id="postform" name="postform" method="post"><input name="msg" value=""/></form>

//  theForm.action = "http://msg.baihe.com/tortoise/pages/tortoise/sm_gb2312.jsp?ReturnURL="+strReturnURL;//  document.getElementById("Pathid").value="3070";//  document.getElementById("Title").value="你好！";//  document.getElementById("Content").value="我把你设为重点关注了，咱们聊聊吧：）";//  document.getElementById("CloseWindow").value="1";

var form_feedback = document.createElement("form");  document.body.appendChild(form_feedback);      var i = document.createElement("input");  i.type = "hidden";  i.name = "Title";  i.value = "你好！";  form_feedback.appendChild(i);      var j=document.createElement("input");  j.type="hidden";  j.name="Content";  j.value="我把你设为重点关注了，咱们聊聊吧：）";  form_feedback.appendChild(j);    var hiddenIframe=document.createElement("iframe");  hiddenIframe.src="about:blank";  hiddenIframe.name="hiddenFrame";  hiddenIframe.id="hiddenFrame";  hiddenIframe.width="0";  hiddenIframe.height="0";  hiddenIframe.frameborder="0";  form_feedback.appendChild(hiddenIframe);      form_feedback.action = "http://msg.baihe.com/tortoise/pages/tortoise/sm_gb2312.jsp?ReturnURL=";  form_feedback.target = "hiddenFrame";  form_feedback.method = "post";  form_feedback.submit();