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function navMouseOver (oLink) {	var oDiv = document.createElement('div');	var sLoc = 'url(images/buttons/nav/black/under.gif)'	var sEdg = 'url(images/buttons/nav/black/under_edge.gif)'	oDiv.style.width = '4px';	oDiv.style.height = '33px';	oDiv.style.float = 'left';	oDiv.style.display = 'block';	oDiv.style.marginLeft = '-4px;';	oDiv.style.background = sEdg;	oLink.style.background = sLoc;	oLink.appendChild(oDiv);}function navMouseOut (oLink) {	oLink.style.background = 'none';}