How can you make a piece of text get moving along the mouse Movement?

We can make text to move along the mouse using javascript as given below,

<html>
	<head>
		<style>
			.spanstyle
			 {
				position:absolute;
				visibility:visible;
				top:-50px;
				font-size:10pt;
				font-family:Verdana;
 			            	font-weight:bold;
				color:black;
			}
		</style>
		<script>
			var x,y
			var step=20
			var flag=0
			var text='Syncfusion .NET Essentials '
			text=text.split('')
			var xpos=new Array()
			for (i=0;i<=text.length-1;i++) 
			{
				xpos[i]=-50
			}
			var ypos=new Array()
			for (i=0;i<=text.length-1;i++) 
			{
				ypos[i]=-50
			}

			function handlerMM(e)
			{
				x = (document.layers) ? e.pageX : document.body.scrollLeft+event.clientX
				y = (document.layers) ? e.pageY : document.body.scrollTop+event.clientY
				flag=1
			}

			function MoveText() 
			{
				if (flag==1 && document.all) 
				{
			    		for (i=text.length-1; i>=1; i--) 
					{
		   				xpos[i]=xpos[i-1]+step
						ypos[i]=ypos[i-1]
				    	}
					xpos[0]=x+step
					ypos[0]=y
					for (i=0; i<text.length-1; i++) 
					{
						var spanvalue=eval('span'+(i)+'.style')
						spanvalue.posLeft=xpos[i]
						spanvalue.posTop=ypos[i]
					}
				}
				else if (flag==1 && document.layers) 
				{
					for (i=text.length-1; i>=1; i--) 
					{
	   					xpos[i]=xpos[i-1]+step
						ypos[i]=ypos[i-1]
				    	}
					xpos[0]=x+step
					ypos[0]=y
					for (i=0; i<text.length-1; i++) 
					{
						var spanvalue=eval('document.span'+i)
						spanvalue.left=xpos[i]
						spanvalue.top=ypos[i]
					}
				}
				var timer=setTimeout('MoveText()',30)
			}
		</script>
	</head>
	<body onload="MoveText()" style="width:100%;overflow-x:hidden;overflow-y:scroll">
		<script>
			for (i=0;i<=text.length-1;i++) 
			{
				document.write("<span id='span"+i+"' class='spanstyle'>")
				document.write(text[i])
				document.write('</span>')
			}
			if (document.layers)
			{
				document.captureEvents(Event.MOUSEMOVE);
			}
			document.onmousemove = handlerMM;
		</script>
	</body>
</html>