// JavaScript Document
// image rollovers for header navigation
// author © shane harland 2008
// website www.numacdrilling.com.au


//load rollover images into cache for quick display...
function cacheImages(){

		      //Image(height, width)
	var homeImg = new Image(28, 63); 
        homeImg.src = "images/nav/over-nav-home.jpg";

	var about = new Image(28, 89); 
        about.src = "images/nav/over-nav-about.jpg";

	var safety = new Image(28, 74); 
        safety.src = "images/nav/over-nav-safety.jpg";

	var enviro = new Image(28, 113); 
        enviro.src = "images/nav/over-nav-enviro.jpg";

	var services = new Image(28, 81); 
        services.src = "images/nav/over-nav-services.jpg";

	var gallery = new Image(28, 86); 
        gallery.src = "images/nav/over-nav-gallery.jpg";

	var rigs = new Image(28, 53); 
        rigs.src = "images/nav/over-nav-rigs.jpg";

	var bookings = new Image(28, 68); 
        bookings.src = "images/nav/over-nav-bookings.jpg";

	var contact = new Image(28, 78); 
        contact.src = "images/nav/over-nav-contact.jpg";

}


//show an above image in the screen on link mouse over
function show(imgName){
	document[imgName].src = eval(imgName+".src");
	//document[imgName].src = eval(imgName+".src" );
}

//hide an above image in the screen on link mouse out
function hide(imgName){
	//document.getElementById("img"+imgNumber).style.visibility = 'hidden';
}