function doTwisty(id,openimage,closeimage){
	if (document.all){
		if (document.all(id).style.display=='none'){
		
			document.all("MroArrow" +id).src=closeimage
			document.all(id).style.display='block'
		}else{
			document.all("MroArrow" +id).src=openimage
			document.all(id).style.display='none'
		}
	}else{
		if (document.layers[id].visibility=='show'){
		
			document.images["MroArrow" +id].src=openimage
			document.layers[id].visibility='hide'
		}else{
			document.images["MroArrow" +id].src=closeimage
			document.layers[id].visibility='show'
		}
	}
	
}