function newImage(arg) {
	if (document.images) {
		rslt = new Image();
		rslt.src = arg;
		return rslt;
	}
}

function changeImages() {
	if (document.images && (preloadFlag == true)) {
		for (var i=0; i<changeImages.arguments.length; i+=2) {
      //alert("changeImages.arguments[" + i + "]].src = changeImages.arguments[" + (i+1) + "]");
			document[changeImages.arguments[i]].src = changeImages.arguments[i+1];
		}
	}
}
//declare some global variables
var preloadFlag = false;
function preloadImages() {
	if (document.images) {
		nav_aboutqc_over = new Image();
    nav_aboutqc_over.src = "/media/header/nav-aboutqc-over.gif";
		nav_aboutqc_off = new Image();
    nav_aboutqc_off.src = "/media/header/nav-aboutqc.gif";
		
		nav_tech_over = new Image();
    nav_tech_over.src = "/media/header/nav-tech-over.gif";
		nav_tech_off = new Image();
    nav_tech_off.src = "/media/header/nav-tech.gif";
		
		nav_prod_over = new Image();
    nav_prod_over.src = "/media/header/nav-prod-over.gif";
		nav_prod_off = new Image();
    nav_prod_off.src = "/media/header/nav-prod.gif";
		
		nav_press_over = new Image();
    nav_press_over.src = "/media/header/nav-press-over.gif";
		nav_press_off = new Image();
    nav_press_off.src = "/media/header/nav-press.gif";
		
		nav_investor_over = new Image();
    nav_investor_over.src = "/media/header/nav-investor-over.gif";
		nav_investor_off = new Image();
    nav_investor_off.src = "/media/header/nav-investor.gif";
		
		nav_careers_over = new Image();
    nav_careers_over.src = "/media/header/nav-careers-over.gif";
		nav_careers_off = new Image();
    nav_careers_off.src = "/media/header/nav-careers.gif";
		
		preloadFlag = true;
		//turn on the image for the section we're in
		turnOnImage();
	}
}

// Function to 'activate' images.
function NavImgOn(imgName) {
        if (document.images && (preloadFlag == true)) {
            document[imgName].src = eval(imgName + "_over.src");
        }
}

function NavImgOff(imgName) {
        if (document.images && (preloadFlag == true)) {
            document[imgName].src = eval(imgName + "_off.src");
        }
}

theBrowserVersion = parseInt(navigator.appVersion);
//get the Path of your current location
thePath = window.location.pathname
if (thePath.indexOf("/about/") != -1){
    directory = "aboutqc";
}
else if (thePath.indexOf("/technology/") != -1){
    directory = "tech";
}
else if (thePath.indexOf("/products/") != -1){
    directory = "prod";
}
else if (thePath.indexOf("/press/") != -1){
    directory = "press";
}
else if (thePath.indexOf("/IR/") != -1){
    directory = "investor";
}
else if (thePath.indexOf("/careers/") != -1){
    directory = "careers";
}
else if (thePath.indexOf("/emd/") != -1){
    directory = "aboutqc";
}
else if (thePath.indexOf("/mediaflo/") != -1){
    directory = "tech";
}
else if (thePath.indexOf("/Community/") != -1){
    directory = "aboutqc";
}
else {
    directory = "home";
}

//set the down state of the current section the client is visiting    
function turnOnImage(){
    if (theBrowserVersion >= 4){ 
        switch(directory){
        case 'aboutqc':				   
						document.nav_aboutqc.src = "/media/header/nav-aboutqc-over.gif";
            nav_aboutqc_over.src = "/media/header/nav-aboutqc-over.gif";
            nav_aboutqc_off.src = "/media/header/nav-aboutqc-over.gif";
            break;
        case 'tech':
            document.nav_tech.src = "/media/header/nav-tech-over.gif";
            nav_tech_over.src = "/media/header/nav-tech-over.gif";
            nav_tech_off.src = "/media/header/nav-tech-over.gif";
            break;
				case 'prod':
            document.nav_prod.src = "/media/header/nav-prod-over.gif";
            nav_prod_over.src = "/media/header/nav-prod-over.gif";
            nav_prod_off.src = "/media/header/nav-prod-over.gif";
            break; 
        case 'press':
            document.nav_press.src = "/media/header/nav-press-over.gif";
            nav_press_over.src = "/media/header/nav-press-over.gif";
            nav_press_off.src = "/media/header/nav-press-over.gif";
            break; 
        case 'investor':
            document.nav_investor.src = "/media/header/nav-investor-over.gif";
            nav_investor_over.src = "/media/header/nav-investor-over.gif";
            nav_investor_off.src = "/media/header/nav-investor-over.gif";
            break; 
        case 'careers':
            document.nav_careers.src = "/media/header/nav-careers-over.gif";
            nav_careers_over.src = "/media/header/nav-careers-over.gif";
            nav_careers_off.src = "/media/header/nav-careers-over.gif";
            break;        
        }
        
    }
}