AutoSave ePerformance Part II

In September I posted a link to some auto Save JavaScript for ePerformance.  This worked, but it prevented the page from timing out and it would also save while I would be typing on the document and then all of a sudden I would be at the top of the document.  This was quite annoying.  At the same time I was working on warning the user about leaving the page via the back button, I had asked Jim Marion a couple questions and he recommended I monkey patch the timeout function to auto save the document. So below is my JavaScript that monkey patches the displayTimeoutMsg function and warns the user if they navigate away from the page with the back button.


<input type="hidden" name="AUTOSAVE" value=""/>
<script type="text/javascript">

threadLock = false;

function user_function()
{
//alert('starting process');

var changes = checkFormChanged(document.%formname);
if (changes && !threadLock)
{
threadLock = true;
if ("%page" == "EP_APPR_MAIN1" || "%page" == "EP_APPR_BASE1")
{
//submitAction_%Formname(document.%Formname,"EP_BTN_LINK_WRK_EP_STORE_PB");
hAction_%Formname(document.%Formname,'EP_BTN_LINK_WRK_EP_STORE_PB', 0, 0, 'Save', false, true);
}
}
}

</script>
<script type="text/javascript" language="javascript">
(function() {
  var originalendModalCntrl = ptCommonObj.endModalCntrl;
  ptCommonObj.endModalCntrl = function() {
    window.onbeforeunload = function(){};
    return new originalendModalCntrl();
  }
})();

window.onbeforeunload = function(e) {
           var changes = checkFormChanged(document.%formname);
if (changes && !threadLock)
{
threadLock = true;
if ("%page" == "EP_APPR_MAIN1" || "%page" == "EP_APPR_BASE1")
{
            return "You have unsaved changes, please save them."
        };
}
}
</script>

<script type="text/javascript">
function adaptLinks() {
    var links = document.getElementsByTagName('a');
    for (i = 0; i != links.length; i++) {
        links[i].onclick = (function () {
            var origOnClick = links[i].onclick;
            return function (e) {
                 window.onbeforeunload = function(){};
                if (origOnClick != null && !origOnClick()) {
                    return false;
                }               
            }
        })();
    }
}
(function() {
  var originaldisplayTimeoutMsg = displayTimeoutMsg;
  displayTimeoutMsg = function() {
    window.onbeforeunload = function(){};
   
    user_function();

    return new  originaldisplayTimeoutMsg();
  }
})();

adaptLinks();
</script>