function MM_swapImgRestore() { //v3.0
  var i,x,a=document.MM_sr; for(i=0;a&&i<a.length&&(x=a[i])&&x.oSrc;i++) x.src=x.oSrc;
}

function MM_findObj(n, d) { //v4.01
  var p,i,x;  if(!d) d=document; if((p=n.indexOf("?"))>0&&parent.frames.length) {
    d=parent.frames[n.substring(p+1)].document; n=n.substring(0,p);}
  if(!(x=d[n])&&d.all) x=d.all[n]; for (i=0;!x&&i<d.forms.length;i++) x=d.forms[i][n];
  for(i=0;!x&&d.layers&&i<d.layers.length;i++) x=MM_findObj(n,d.layers[i].document);
  if(!x && d.getElementById) x=d.getElementById(n); return x;
}

function MM_swapImage() { //v3.0
    var i, j = 0;
    var a = MM_swapImage.arguments;
    document.MM_sr=new Array;
    for( i = 0; i < (a.length - 2); i += 3 ) {
        if ( (x = MM_findObj(a[i])) != null ) {
            document.MM_sr[j++] = x;
            if(!x.oSrc) x.oSrc=x.src;
            x.src=a[i+2];
        }
    }
}

startList = function() {
    navRoot = document.getElementById("nav");
    for ( i = 0; i < navRoot.childNodes.length; i++) {
        node = navRoot.childNodes[i];
        if (node.nodeName=="LI") {
            if (document.all && document.getElementById) {
                node.onmouseover=function() {
                    this.className+=" over";
                }
            }
            node.onmouseout=function() {
                this.className=this.className.replace("over", "");
            }

            node.onclick = function() {
                var dropDownVisible = this.className.indexOf("over") != -1;
                if(!dropDownVisible) {
                    this.className+=" over";
                }
            }
        }
	}
}

addLoadEvent(startList);