function preLoadImages() {
    preload_image_object = new Image();
    image_url = new Array();
    regions = new Array();
    regions[0] = "africa";
    regions[1] = "americas";
    regions[2] = "australia";
    regions[3] = "europe";
    regions[4] = "india";
    regions[5] = "mideast";
    regions[6] = "russia";
    var imageNumber = 0;
    for (i=0; i<document.images.length; i++) {
        var imagePath = document.images[i].src.split('/');
        var mapFile = imagePath[imagePath.length-3]
        var imageName = imagePath[imagePath.length-1];
        if (mapFile == 'map-files' && imageName != 'spacer.gif') {
            for (j=0; j<regions.length; j++) {
                image_url[imageNumber] = "map-files/" + regions[j] + "-images/" + imageName;
                preload_image_object.src = image_url[imageNumber];
                imageNumber++;
            }
        }
    }
}

function changeMap(region) {
    //Change Map Images
    for (i=0; i<document.images.length; i++) {
        var imagePath = document.images[i].src.split('/');
        var mapFile = imagePath[imagePath.length-3]
        var imageName = imagePath[imagePath.length-1];
        if (mapFile == 'map-files' && imageName != 'spacer.gif') {
            document.images[i].src = "map-files/" + region + "-images/" + imageName;
        }
    }
    //Hide Scholars
    var profiles = document.getElementById("wienprofiles").getElementsByTagName("div");
    for (i=0; i<profiles.length; i++) {
        profiles[i].style.display="none";
    }
    //Show map content
    document.getElementById(region+"OnMap").style.display="block";
    document.getElementById(region+"OnSide").style.display="block";
}


function defaultMap(region) {
    //Default Map Images
    for (i=0; i<document.images.length; i++) {
        var imagePath = document.images[i].src.split('/');
        var mapFile = imagePath[imagePath.length-3]
        var imageName = imagePath[imagePath.length-1];
        if (mapFile == 'map-files' && imageName != 'spacer.gif') {
            document.images[i].src = "map-files/default-images/" + imageName;
        }
    }
    //Show Scholars
    var profiles = document.getElementById("wienprofiles").getElementsByTagName("div");
    for (i=0; i<profiles.length; i++) {
        profiles[i].style.display="block";
    }
    //Hide map content
   document.getElementById(region+"OnMap").style.display="none";
   document.getElementById(region+"OnSide").style.display="none";
}