var prevToolLink;
    var prevToolClassName;
	function clearPreviousToolLink() {
		if(prevToolLink) {
            prevToolLink.className = prevToolClassName;
		}
	}
 	function showToolContent(url, linkId) {
		var contentIfrm = document.getElementById('toolFrame');
		contentIfrm.src = url;
        clearPreviousToolLink();
        var srcLink = document.getElementById(linkId);
        prevToolLink = srcLink;
        prevToolClassName = prevToolLink.className;
        srcLink.className = 'toolPanelCellSelection';
	}