<Script>
function submit_username123_show(){
for(var i=0;i< $('form123').length;i++)
{
if($('form123')[i].type=='textbox' && $('form123')[i].value=='')
{
alert('please filled up');
}
}
}
</script>
<script>
function disableForm(theform) {
if (document.all || document.getElementById) {
for (i = 0; i < theform.length; i++) {
var formElement = theform.elements[i];
if (true) {
formElement.disabled = true;
}
}
}
}
</script>