[jQuery] Simple Tooltip

[jQuery] Simple Tooltip


Hello,
I need a simple tooltip which html markup is only a div. I have the
following:
this.tooltip = function(){
    /* CONFIG */
        xOffset = 10;
        yOffset = 20;
        // these 2 variable determine popup's distance from the cursor
        // you might want to adjust to get the right result
    /* END CONFIG */
    $("a.tooltip").hover(function(e){
        this.t = this.title;
        this.title = "";
        $("body").append("<div id='tooltip'><span>"+ this.t +"</span></
div>");
        $("#tooltip")
            .css("top",(e.pageY - xOffset) + "px")
            .css("left",(e.pageX + yOffset) + "px")
            .fadeIn("fast");
},
    function(){
        this.title = this.t;
        $("#tooltip").remove();
});
    $("a.tooltip").mousemove(function(e){
        $("#tooltip")
            .css("top",(e.pageY - xOffset) + "px")
            .css("left",(e.pageX + yOffset) + "px");
    });
};
How can I change this plugin to use CSS Class selectors?
And how can I add a parameter to define the tooltip div CSS Class?
Does anyone knows a better Simple Tooltip?
Most tooltips I see have complex markup and some of them even include
headers tags in the tooltip which in my opinion shouldn't happen.
Thanks,
Miguel