var oldImage = '';

function loader() {
    var imgArray = new Array( "breast","body","facial","skin_care");
    // alert(imgArray[4]);
    if (document.images) {
        for (var i=0; i<imgArray.length; i++) {
            eval(imgArray[i] + "on = new Image();");
            eval(imgArray[i] + "on.src = 'images/" + imgArray[i] + "_over.jpg'");
            eval(imgArray[i] + "off = new Image();");
            eval(imgArray[i] + "off.src = 'images/" + imgArray[i] + ".jpg'");
            var el = document.getElementById(imgArray[i]);
            el.onmouseover = function() {
                var me = this.id;
                if (document.images) {
                  document[me].src = eval(me + "on.src");
                }
                if (oldImage != '') {
                  if (oldImage != me) {
                  oldImage.onmouseout;
                  }
                }
                oldImage = me;
            };
            
            el.onmouseout = function() {
              imageName = this.id;
              if (document.images) {
                if ( document[imageName] ) { document[imageName].src = eval(imageName + "off.src"); }
              }
            }
        }
    }
}