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using javascript variable in html tag

Last Modified: 2012-05-09
I want to use a java script variable in my html tag, but don't know haw to do it. Can someone please show me how to make the following code work?
I'm trying to insert the value of Javascript variable "screenw" into the rel="" value of the anchor tag.


<script type="text/javascript">
var screenw;
var screenh;
screenw = screen.width;
screenh = screen.height;
screenw = (screenw/1.2);
screenh = (screenh/1.2);
screenw = (Math.round(screenw));
screenh = (Math.round(screenh));

<a href="26leads.swf" class="bumpbox" title="PLATINUM network for Administrators" rel="<SCRIPT type="text/javascript">document.write(screenw);</SCRIPT>-750">Leads Dashboard for Administrators <br /> </a>
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