// Function to 'activate' images.
function imgOn(imgName) {
       // if (document.images) {
       if (currentNav != imgName)
            document[imgName].src = eval(imgName + "Hover.src");
      //  }
}

// Function to 'deactivate' images.
function imgOff(imgName) {
        //if (document.images) {
        if (currentNav != imgName)
            document[imgName].src = eval(imgName + "Off.src");
       // }
}

// Turn on the nav image to show what page we are or what section we are in
function chooseNavImage() {
	var qs = queryString("nav");
	if (qs != "false")
		currentNav = qs;
		
	document[currentNav].src = eval(currentNav + "On.src");

}

//Query String parsing routine
function PageQuery(q) {
if(q.length > 1) this.q = q.substring(1, q.length);
else this.q = null;
this.keyValuePairs = new Array();
if(q) {
for(var i=0; i < this.q.split("&").length; i++) {
this.keyValuePairs[i] = this.q.split("&")[i];
}
}
this.getKeyValuePairs = function() { return this.keyValuePairs; }
this.getValue = function(s) {
for(var j=0; j < this.keyValuePairs.length; j++) {
if(this.keyValuePairs[j].split("=")[0] == s)
return this.keyValuePairs[j].split("=")[1];
}
return false;
}
this.getParameters = function() {
var a = new Array(this.getLength());
for(var j=0; j < this.keyValuePairs.length; j++) {
a[j] = this.keyValuePairs[j].split("=")[0];
}
return a;
}
this.getLength = function() { return this.keyValuePairs.length; } 
}
function queryString(key){
var page = new PageQuery(window.location.search); 
return unescape(page.getValue(key)); 
}