var SLS_OFF = 0;
var MEDIALIBRARY_OFF = 1;
var ELECRESOURCES_OFF = 2;
var SLS_ON = 3;
var MEDIALIBRARY_ON = 4;
var ELECRESOURCES_ON = 5;

var sideMenuImages = new Array(new Image(), new Image(), new Image(), new Image(), new Image(), new Image())

function changeSideMenuImage(imgObj, imgIndex) {
	if (sideMenuImages[imgIndex].complete)
		imgObj.src = sideMenuImages[imgIndex].src;
}

function preloadSideMenuImages() {
	sideMenuImages[0].src = "/Center/Resources/Images/SchoolLibrary_Off.gif";
	sideMenuImages[1].src = "/Center/Resources/Images/MediaLibrary_Off.gif";
	sideMenuImages[2].src = "/Center/Resources/Images/ElectronicResources_Off.gif";
	sideMenuImages[3].src = "/Center/Resources/Images/SchoolLibrary_On.gif";
	sideMenuImages[4].src = "/Center/Resources/Images/MediaLibrary_On.gif";
	sideMenuImages[5].src = "/Center/Resources/Images/ElectronicResources_On.gif";
}
preloadSideMenuImages();