Thanks to those who responded on this. What I've done is to make a file
which uses the javascript to determine the space available in the
browser window, viz:
<script type="text/javascript">
var height = 0;
if( typeof( window.innerWidth ) == 'number' )
{
//Non-IE
height = window.innerHeight;
}
else if( document.documentElement && (
document.documentElement.clientWidth ||
document.documentElement.clientHeight ) )
{
//IE 6+ in 'standards compliant mode'
height = document.documentElement.clientHeight;
}
else if( document.body && ( document.body.clientWidth ||
document.body.clientHeight ) )
{
//IE 4 compatible
height = document.body.clientHeight;
}
if (height>0)
{
window.location.href = "index.php?height="+ height;
} else
exit();
</script>
Of course, since the php is server-side, I then have to send the height
variable to the php via another page load (window.location.href).
This page then takes the height, knocks off the div height and divides
by 2 to get the correct margin-top, which it then writes to the inline
CSS in two sections:
<?php
IF ($_GET['height']<>100)
{
$space=$_GET['height'];
$margin=($space-200)/2;
} ELSE
{
$margin=100;
}
?>
<?php
echo"<div id=\"viewport\" style=\"margin : ".$margin."px auto;\">\n";
echo" <h1>The top margin is set to ".$margin."!</h1>";
echo"</div>\n ";
?>
I have also trapped it, so that anyone without javascript will get a
top-margin of 100px;
You can see all this at: http://www.rhh.myzen.co.uk/gam/sandbox/
It's a bit clumsy, and I don't like reloading a page, so I'm grateful
for any really good /suggestions / improvements!
Thanks.
http://www.rhh.myzen.co.uk/gam/sandbox/i
--
Bob
www.gwelanmor-internet.co.uk
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