function doTooltip(e, ar) {
    if ( typeof Tooltip == "undefined" || !Tooltip.ready ) return;
    var cntnt = wrapTipContent(ar);
    var tip = document.getElementById( Tooltip.tipID );
    Tooltip.show(e, cntnt);
}

function hideTip() {
    if ( typeof Tooltip == "undefined" || !Tooltip.ready ) return;
    Tooltip.hide();
}

function wrapTipContent(ar) {
    var cntnt = "";
    if ( ar[0] ) cntnt += '<div class="img"><img src="' + ar[0] + '"></div>';
    if ( ar[1] ) cntnt += '<div class="txt">' + ar[1] + '</div>';
    return cntnt;
}

// tooltip content here
var messages = new Array();
// array elements: image file name, optional text
messages[0] = ['images/rallado.jpg'];
messages[1] = ['images/rallado.jpg'];
messages[2] = ['images/rallado.jpg'];

// optional preloader 
var imageHandler = { 
    path:"images/", // path to images
    imgs:[], preload:function() { for(var i=0;arguments[i];i++) {
    var img=new Image(); img.src=this.path+arguments[i]; this.imgs[this.imgs.length]=img;}}
}

imageHandler.preload("rallado.jpg");