How can I echo this javascript if the php error messages is called? I have an error message setting that when a user misses his username or password it triggers an error message. The php error message is called by a php code. Here is the code:

<?php echo showmessage($msg) ?> 

I have an alert message in javascript that when called it will make a javascript css pop up alert box. IF the javascript code is present it will show the alert box right away after reload. Here is code:

<script type="text/javascript">  
  $(document).ready(function () {  
   jqxAlert.alert('Alert Message');  
  })  
</script>  

How can I incorporate so that when the php echo message comes up it will trigger the javscript alert message. I was trying an if in php, so something like this code:

if ( showmessage($msg) ) {
   <script type="text/javascript">  
     $(document).ready(function () {  
         jqxAlert.alert('Alert Message');  
     })  
   </script>
}

How can I echo my javascript message on the php call?