function $(id){
	return document.getElementById(id);
}
function ImageSlider(divid)
{
	var currentObj = $("openedId");
	
	if (currentObj.value != divid){
		$("img_"+currentObj.value).style.display = 'none';
		$("img_"+divid).style.display = 'block';		
	}
	currentObj.value = divid;
	
}