var nameArray = new Array();

function openPopUp( URL, name, height, width, misc)
{
	
	var top = (screen.height - height) /2;	
	var left = (screen.width - width) /2;
	
	var features = "height=" + height + ", width=" + width + ", top=" + top + ",left=" + left + "," + misc;
	
	if (nameArray[ name] != null)
	{
		if (!nameArray[ name].closed)
			nameArray[ name].focus();
		else
			nameArray[ name] = window.open(URL, name, features);
	}
	else
		nameArray[ name] = window.open(URL, name, features);
}