var curX,curY,dircX,dircY,clientW,clientH,divW,divH,status;
curX=1;
curY=1;
dircX=1;
dircY=1;
clientW=800;
clientH=600;
divW=150;
divH=100;
status=true;
function adDivMove()
{
	if(status==true)
	{
		var adDiv=document.getElementById("adDiv");			
		if(dircX==1)
			curX=(curX+1);
		else
			curX=(curX-1);
		if(dircY==1)
			curY=(curY+1);
		else
			curY=(curY-1);
		if(curX>=(document.body.clientWidth-divW))
			dircX=0;
		if(curY>=(document.body.clientHeight-divH))
			dircY=0;
		if(curX<=0)
			dircX=1;
		if(curY<=0)
			dircY=1;
		newLeft=curX+"px";
		newTop=curY+"px";
		adDiv.style.left=newLeft;
		adDiv.style.top=newTop;
		setTimeout("adDivMove()",1);
	}
}
function adDivStop()
{
	status=false;
}

function adDivPlay()
{
	status=true;
	adDivMove();
}