function preview(path,id,w,h) {
	win_w=parseInt(w);
	win_h=parseInt(h);
	var left = (screen.availWidth-win_w)/2;
	var top = ((screen.availHeight-win_h)/2)-30;
	var styleStr = 'toolbar=no,location=no,directories=no,status=no,menubar=no,scrollbars=no,resizable=no,copyhistory=yes,width='+win_w+',height='+win_h+',left='+left+',top='+top;
	var msgWindow = window.open("../admin/includes/view_image.php?path="+path+id+"_hi.jpg","img"+id, styleStr);
	msgWindow.focus();
}