PHP & JavaScript Lightbox

[ShoeLace1291]

Ok, I have a code that gets the logged in user's member name and verifies that they are an admin.  I also have a code that greys out the rest of the page and displays the content of another in a smaller box.  How would I incorporate this code into an if statement?

 

Example:

if(!$isAdmin){
display lightbox with login form
}

 

JavaScript Code

function cover() 
{  

var cover=document.getElementById('cover');

if(vis)
{
	vis=0;
	cover.style.display='block';      
} 
else 
{   
	vis=1;
	cover.style.display='none'; 
}

}

[RichardRotterdam]

<script>

var isAdmin=<?php echo($isAdmin)?>

if(!isAdmin){

display lightbox with login form

}

</script>