function imageoverlay(id1,id2){
	var path='thumb_g'+id1+'_p'+id2;
	document.getElementById(path).innerHTML='';
}

function closeoverlay(id1,id2){
	var path='thumb_g'+id1+'_p'+id2;
	document.getElementById(path).innerHTML='<div style="width:100%; height:100%; background: url(images/fade.png);"></div>';
}