Upload file + title

{
    type : 'checkbox',
    id : 'PrivateFlag',
    label: 'Private',
    checked : false,
    onClick: function()
       {
       var theFrame = document.getElementById("125_fileInput")
       var theDoc = theFrame.contentDocument || theFrame.contentWindow.document;
       var theForm = theDoc.forms[0]
       var action = theForm.getAttribute("action") // alert("pre:"+theForm.getAttribute("action"))
       
       if (action.indexOf("&target=P") == -1)
          action += "&target=P"
       else
          action = action.replace("&target=P","")

       theForm.setAttribute("action",action) // alert("post: "+theForm.getAttribute("action"))
       }
},