function rollup() {
    if ( document.getElementById('rollup') ) {
        var parent = document.getElementById('rollup');
        // initialize
        var dts = parent.getElementsByTagName('dt');
        var dds = parent.getElementsByTagName('dd');
        for ( var i = 0; i < dds.length; i++ ) {
            dds[i].className = 'hidden';
        }
        // attach events
        for ( var i = 0; i < dts.length; i++ ) {
            dts[i].className = 'trigger';
            dts[i].onclick = function( evt ) {
                var element = this.nextSibling;
                while ( element && element.nodeType != 1 ) {
                    element = element.nextSibling;
                }
                var swap = element.className;
                element.className = (swap == '') ? 'hidden' : '' ;
            }
        }
    }
}

function buildsubmenus() {
    if (document.getElementById("main-nav") ) {
        var menuids=["main-nav"]; 
	for (var i=0; i<menuids.length; i++) {
            var ultags=document.getElementById(menuids[i]).getElementsByTagName("ul");
            for (var t=0; t<ultags.length; t++) {
    		ultags[t].parentNode.getElementsByTagName("a")[0].className="subfolderstyle";
                if (ultags[t].parentNode.parentNode.id==menuids[i]) {
                    ultags[t].style.left="212px";
                }
                else {
                    ultags[t].style.left="200px";
                }
                ultags[t].parentNode.onmouseover=function(){
                    this.getElementsByTagName("ul")[0].style.display="block"
                }
                ultags[t].parentNode.onmouseout=function(){
                    this.getElementsByTagName("ul")[0].style.display="none"
                }
            }
            for (var t=ultags.length-1; t>-1; t--) { 
                ultags[t].style.visibility="visible";
                ultags[t].style.display="none";
            }
  	}
    }
}

DOMhelp.addEvent(window, 'load', buildsubmenus, false);
DOMhelp.addEvent(window, 'load', rollup, false);