Validation errors reset item attributes

Question

I have some java script code that gets executed with an onchange event to set the disable attribute of other fields. It works great. But if I get an error when validation is run, it resets the item attributes back to disable=false. Why is this and how do I get around it? Thanks in advance for your help.
Code from javascript...
function set_other_fields(pThis){
if (pThis.value == 'U') {                 
document.getElementById('P12_DEFAULT_VALUE').disabled=true;
document.getElementById('P12_DEFAULT_VALUE').value='';
document.getElementById('P12_LOOKUP_NAME_LKUP_ID').disabled=true;
document.getElementById('P12_LOOKUP_NAME_LKUP_ID').value='';
if (pThis.value == 'D') {
document.getElementById('P12_LOOKUP_NAME_LKUP_ID').disabled=true;
document.getElementById('P12_LOOKUP_NAME_LKUP_ID').value='';
document.getElementById('P12_DEFAULT_VALUE').disabled=false;
if (pThis.value == 'L') {
document.getElementById('P12_LOOKUP_NAME_LKUP_ID').disabled=false;
document.getElementById('P12_DEFAULT_VALUE').disabled=true;
document.getElementById('P12_DEFAULT_VALUE').value='';
}

Answer 1

Hi Kristina,
The disabled values will be reset as the page is reloaded after the validation errors and the onchange event isn't triggered.
You can force your javascript to run whenever the page is rendered (and this would be on the initial load as well), by adding a call to your function somewhere underneath both the function and all relevant fields. So, add something like the following somewhere at the bottom of your page:
<script type="text/javascript">
set_other_fields(document.getElementById("ID_of_the_field_that_has_the_onchange"));
</script>Because this isn't within a function block itself, it will be run as soon as it is loaded by the browser - hence ensuring that everything is on the page before this point.
Andy