function wop(url, wnd_name, width, height)
{
	w = window.open(
			url, 
			wnd_name, 
			'width=' + width + ', height = ' + height + ', status = no, menubar = no, resizable = no, scrollbars = yes, left = ' + String((screen.width - width)/2) + ', top = ' + String((screen.height - height)/2)
		);
	w.focus();
	return w;
}

function wop2(url, wnd_name, width, height)
{
	w = window.open(
			url, 
			wnd_name, 
			'width=' + width + ', height = ' + height + ', status = no, menubar = no, resizable = no, scrollbars = no, left = ' + String((screen.width - width)/2) + ', top = ' + String((screen.height - height)/2)
		);
	w.focus();
	return w;
}

function view_image(url, title, width, height)
{
	var id = 'view_image_' + url;
	id = id.replace(/([^A-Za-z0-9])/g, "_");
	w = window.open(
			'/LT/view.image.php?path=' + url + '&title=' + title, 
			id, 
			'width=' + width + ', height = ' + height + ', status = no, menubar = no, resizable = no, scrollbars = no, left = ' + String((screen.width - width)/2) + ', top = ' + String((screen.height - height)/2)
		);
	w.focus();
	return w;
}

function view(element)
{
	document.getElementById(element).style.display = 'block';
}
function hide(element)
{
	document.getElementById(element).style.display = 'none';
}

function visible(element)
{
	if (document.getElementById(element).style.display == 'none') {
		document.getElementById(element).style.display = 'block';
	}
	else if (document.getElementById(element).style.display == 'block') {
		document.getElementById(element).style.display = 'none';
	}	
}