function showSelectBoxes(){
	var selects = document.getElementsByTagName("select");
	for (i = 0; i != selects.length; i++) {
		selects[i].style.visibility = "visible";
	}
}

function hideSelectBoxes(){
	var selects = document.getElementsByTagName("select");
	for (i = 0; i != selects.length; i++) {
		selects[i].style.visibility = "hidden";
	}
}

function viewImage(id,img){
	var w=850;
	var h=700;
    var l=(screen.width-w)/2;
	var t=(screen.height-h)/2;

	if(window.thiswin != undefined){
		thiswin.close();
	}
	thiswin = window.open("/enlarge_images.php?id="+id+"&num="+img,"popupwin",'toolbar=0,location=0,directories=0,status=0,menubar=0,scrollbars=1,resizable=0,width='+w+',height='+h+',left='+l+',top='+t);
}