// JavaScript Document

hShow = function() {
    var theTxt = document.getElementById("nav").getElementsByTagName("A");
    for (var i=0; i<theTxt.length; i++) {
        theTxt[i].onclick=function() {
        var theRef = this.getAttribute('href');
            var hash= theRef.indexOf('#')+1;
            var theDiv= theRef.substr(hash);
            theToggleDiv = document.getElementById(theDiv);
             var alreadyOn=0;
            var c = " " + theToggleDiv.className + " ";
            if (c.indexOf(" " + "over" + " ") == -1){alreadyOn = 1} 
            clearClasses();
            if (alreadyOn == 1) {theToggleDiv.className+=" over"}
        return false;
        }
    }
}


function clearClasses(){
var    navRoot = document.getElementById("collapseBlock");
    for (j=0; j<navRoot.childNodes.length; j++) {
        var node = navRoot.childNodes[j];
        if (node.nodeName=="DIV") {
        var x=node;
        x.className=x.className.replace(new RegExp(" over\\b"), "");
        }
    }
}
window.onload = hShow;