var angle= 0;
var imgIntervalId = 0;
var imgid= 0;

function rotate(img)
{
	imgid= img;
	imgIntervalId = setInterval ("startrotate()", 50);
}

function startrotate()
{
	angle += 1;
	if (angle > 3) 
		angle =0;
	imgid.style.filter='progid:DXImageTransform.Microsoft.BasicImage(rotation='+ angle +')'
}

function stop_rotate()
{
	imgid.style.filter='progid:DXImageTransform.Microsoft.BasicImage(rotation=0)'
	imgid= 0;
	angle= 0;
	clearInterval (imgIntervalId);
}