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");
    if (navRoot) {
        for (i = 0; i < navRoot.childNodes.length; i++) {
            var node = navRoot.childNodes[i];
            if (node.nodeName == "LI") {
                overize(node);
                if(node.getElementsByTagName("ul").length>0) {
                    var subNavRoot = node.getElementsByTagName("ul")[0];
                    for (j = 0; j<subNavRoot.childNodes.length; j++) {
                        var subNode = subNavRoot.childNodes[j];
                        overize(subNode);
                    }
                }
            }
        }
    }
}

function overize(node) {
    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);