Expanding ad script

Hi there... Can anyone help with this issue... We have an expanding box unit in the right-hand column of our site. When a user clicks on the unit, it should expand to the left. It works in FireFox but not in IE. In IE it expands to the right and off the screen. function show_div(div_id) { // hide all the divs document.getElementById('primary').style.display = 'none'; document.getElementById('expand').style.display = 'none'; //document.getElementById('intro').sty

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