Event handling in javascript

Question

I have a jsp page which should display a javascript message prompting the user to save the changes made on a page when he clicks on a link to another view, but only if he has changed the values in any fields in the current page. So I need to capture onChange events for any element in the form.
Can an onChange event be handled at the window or document level?

Answer 1

Thanks for the responses. I managed to find the javascript solution to my problem. The following function storeChange() is called when the page is loaded.
var isDirty = false;
function storeChange() {
  if(navigator.appName.indexOf("Microsoft Internet Explorer") != -1){
    for (i=0; i < document.form1.elements.length ; i++) {
      document.form1.elements.attachEvent("onchange",setDirtyFlag);
else if(navigator.appName.indexOf("Netscape") != -1) {
document.captureEvents(Event.CHANGE);
document.onchange=setDirtyFlag;
function setDirtyFlag() {
isDirty = true;
So any form element's onChange event triggers the setDirtyFlag() method. On submit of the page, i check this flag to determine if any values were modified. I have tested this code with IE6.0 and NS4.7.