function float_div(divId,txt)
			{
				var background_Color;
				background_Color = 'red';
				var text_color;
				text_color = 'black';
				var borderColor;
				borderColor = '1px solid black';
				var dWidth;
				dWidth = '150px';
				var dPosition;
				dPosition = 'absolute';
				
				var createEl = document.createElement("div");
				
				createEl.setAttribute("id","floatDiv");
				document.body.appendChild(createEl);
				
				var obj = document.getElementById("floatDiv");
				
				obj.style.backgroundColor = background_Color;
				obj.style.color = text_color;
				obj.style.border = borderColor;
				obj.style.width = dWidth;
				obj.style.position = dPosition;
				
				obj.style.display=(obj.style.display == 'block')?'none':'block';
				
				obj.innerHTML = txt;
				divId = document.getElementById(divId);
				divId.onmousemove = function (e)
				{
					var posx = 0;
				    var posy = 0;
				    if (!e) var e = window.event;
				    if (e.pageX || e.pageY)
				    {
				        posx = e.pageX;
				        posy = e.pageY;
				    }
				    else if (e.clientX || e.clientY)
				    {
				        posx = e.clientX;
				        posy = e.clientY;
				    }
					obj.style.left = parseInt(posx);
					obj.style.top = parseInt(posy)
				}
				divId.onmouseout = function ()
				{
					obj.style.display=(obj.style.display == 'block')?'none':'block';
				}	
			}	

<script>
var obj;
function float_div(divId,txt)
			{
				var background_Color;
				background_Color = 'red';
				var text_color;
				text_color = 'black';
				var borderColor;
				borderColor = '1px solid black';
				var dWidth;
				dWidth = '150px';
				var dPosition;
				dPosition = 'absolute';
				var createEl = document.createElement("div");
				createEl.setAttribute("id","floatDiv");
				document.body.appendChild(createEl);
				divId = document.getElementById(divId);
				divId.onmousemove = function (e)
				{
					if (obj == null)
					{
						obj = document.getElementById("floatDiv");
						obj.style.backgroundColor = background_Color;
						obj.style.color = text_color;
						obj.style.border = borderColor;
						obj.style.width = dWidth;
						obj.style.position = dPosition;
						obj.innerHTML = txt;
					}
					else
					{
						obj.style.display="block";
					}
					var posx = 0;
				    var posy = 0;
				    if (!e) var e = window.event;
				    if (e.pageX || e.pageY)
				    {
				        posx = e.pageX-10;
				        posy = e.pageY-30;
				    }
				    else if (e.clientX || e.clientY)
				    {
				        posx = e.clientX-10;
				        posy = e.clientY-30;
				    }
					obj.style.left = parseInt(posx);
					obj.style.top = parseInt(posy)
				}
				divId.onmouseout = function ()
				{
					obj.style.display="none";
				}
			}
</script>
<div id="div1" style="border:1px solid red;width:200px;height:200px;">BLABLABLABLA</div>
<script>
	float_div("div1","Rotter Rulllllzz")
</script>