I dont know why this is happening, but maybe it is supposed to happen. I have a checkbox on a page that when checked, checks all the others on that page, using getElementByTagName("input") and then checking it if the type attribute is checkbox. (tell me if you want me to post the code) This works perfectly normally, but as soon as I put a form field around it (which is neccesary) it says Object doesn't support this property or method. I have used the onclick attribute of the checkbox to execute the script, if that has something to do with it.