function setOpacity(obj, degree)
{
	if (obj.filters&&obj.filters[0]){
		if (typeof obj.filters[0].opacity=="number") //if IE6+
			obj.filters[0].opacity=degree
		else //else if IE5.5-
			obj.style.filter="alpha(opacity="+degree+")"
	}
	else if (obj.style.MozOpacity)
		obj.style.MozOpacity=degree/100
	else if (obj.style.KhtmlOpacity)
		obj.style.KhtmlOpacity=degree/100
	else if (obj.style.opacity&&!obj.filters)
		obj.style.opacity=degree/100
}