var arrPreload = new Array();
var imgPrevObj ;
        
function preload(imageList) {
    var images = imageList.split(',');
    
    for(i=0;i<images.length;i++) {
        arrPreload[i] = new Array();
        arrPreload[i][0] = images[i];
        arrPreload[i][1] = new Image;
        arrPreload[i][1].src=images[i];
    }
}

function switchImageById(imgObject, newImageId) {
    try {
        imgObject.src = arrPreload[newImageId][1].src
        window.status = '';
    }
    catch ( e ) {
        window.status = 'Pre-Loading not complete';
    }
}

function switchImageByName(imgObject, newImageName) {
    try {
        for(i=0;i<arrPreload.length;i++) {
            if(arrPreload[i][0].toLowerCase()==newImageName.toLowerCase()) {
                imgObject.src = arrPreload[i][1].src;
            }
        }
        window.status = '';
    }
    catch ( e ) {
        window.status = 'Pre-Loading not complete';
    }
}