JQuery : Tooltip and Image Preview

Case : You want to create cool tooltip or image preview from your thumbnail
Solution : JQuery
Script :

this.imagePreview = function(){
/* CONFIG */

 xOffset = 10;
 yOffset = 30;

 // these 2 variable determine popup's distance from the cursor
 // you might want to adjust to get the right result

/* END CONFIG */
$("a.preview").hover(function(e){
 this.t = this.title;
 this.title = "";
 var c = (this.t != "") ? "
" + this.t : "";
 $("body").append("
"+ c +"
");        
 $("#preview")
  .css("top",(e.pageY - xOffset) + "px")
  .css("left",(e.pageX + yOffset) + "px")
  .fadeIn("fast");     
   },
function(){
 this.title = this.t;
 $("#preview").remove();
   });
$("a.preview").mousemove(function(e){
 $("#preview")
  .css("top",(e.pageY - xOffset) + "px")
  .css("left",(e.pageX + yOffset) + "px");
});  
};

// starting the script on page load
$(document).ready(function(){
imagePreview();
});

Source : http://cssglobe.com/post/1695/easiest-tooltip-and-image-preview-using-jquery