Put unique bookmarks on the data/report items that you want to auto click on. For example if you have a label that you want the hyperlink to go to google, put the bookmark in as "linktogoogle". Next add a text element at the bottom of the report that is similar to:
<script language="JavaScript">
function invokeDrill(id){
var gg = document.getElementById(id).getElementsByTagName('a');
window.location.href = gg[0].href;
}
if( <VALUE-OF>params["InvokeDrill"].value</VALUE-OF> ){
invokeDrill("linktogoogle");
}
</script>
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In the above example the value of the report parameter determines if the link is auto clicked. Data from a data set could be used as well.
