How to make image rollover?

[RAMMSTEIN]

xhamster.com based with vshare and they make it with this code

Java script

var thumbs=new Array();
var stat=new Array();
var thumb=new Array();

function rotatethumb(i,str)
{ var loop=0;

	if (stat[str])
	{
		while ((thumbs[str][i]==0 || i>=3) && loop<100)
		{ if (i>=3) { i=0; }
			else
			{ i++;
			}
			loop++;
		}

		if (thumb[str][i].complete)
		{	document.getElementById(str).src=thumb[str][i].src;
			setTimeout("rotatethumb("+(i+1)+",'"+str+"')",500);
		}
		else
		{	setTimeout("rotatethumb("+i+",'"+str+"')",20);
		}
	}


}

function loadthumb(url,str,j)
{	if (stat[str]) { thumb[str][j].src=url; }
}

function startr(str,ta,te)
{	stat[str]=1;
	var num;
	var first=1;

	for(var j=0;j<3;j++)
	{ if (thumbs[str][j]==1)
		{ thumb[str][j]=new Image();
			num=j+1;
			if (first) { first=0; loadthumb(ta+num+te,str,j); }
			else { setTimeout("loadthumb('"+ta+num+te+"','"+str+"',"+j+")",j*50); }
		}
	}
	rotatethumb(0,str);
}

function endr(str)
{	stat[str]=0;
}

and the template code is like this

[img]{$tmburl}/1_{$new_video[i].VID}.jpg[/img]

But do not work :(