Alert If No Subject Is Entered When Posting/PMing

[Richie]

Description: Makes an alert pop-up if a user doesn't enter a subject when they pm/post. also the post/pm is not submitted.
Cross Browser?: Yes
Preview: NONE
Placement: Global Footers
<script type="text/javascript">
/* Alert If No Subject Is Entered When Posting/PMing By Son Of Exodia */
/* Global Footers */

if(document.postForm){
document.postForm.onsubmit=function(){
if(document.postForm.subject.value==""){
alert("You Did Not Enter A Subject!");
return false;
}}}
</script>

[iPokemon.php]

Accepted