$.fn.ToolTip = function(bgcolour, fgcolour)
{
	this.mouseover(
		function(e)
		{
			if((!this.title && !this.alt) && !this.tooltipset) return;
			// get mouse coordinates
			// based on code from http://www.quirksmode.org/js/events_properties.html
			var mouseX = e.pageX || (e.clientX ? e.clientX + document.body.scrollLeft : 0);
			var mouseY = e.pageY || (e.clientY ? e.clientY + document.body.scrollTop : 0);
			mouseX += 10;
			mouseY += 10;
			bgcolour = bgcolour || "#c8cfd8";
			fgcolour = fgcolour || "#2a374a";
			// if there is no div containing the tooltip
			if(!this.tooltipdiv)
			{
				// create a div and style it
				var div = document.createElement("div");
				this.tooltipdiv = div;
				$(div).css(
				{
					border: "1px solid #55647a",
					padding: "7px",
					paddingLeft: "15px",
					paddingRight: "15px",
					backgroundColor: bgcolour,
					color: fgcolour,
					fontSize: "11px",
					position: "absolute"
				})
				// add the title/alt attribute to it
				.html((this.title || this.alt));
				this.title = "";
				this.alt = "";
				$("body").append(div);
				this.tooltipset = true;
			}
			$(this.tooltipdiv).show().css({left: mouseX + "px", top: mouseY + 3 + "px"});
		}
	).mouseout(
		function()
		{
			if(this.tooltipdiv)
			{
				$(this.tooltipdiv).hide();
			}
		}
	);
	return this;
}