/**
* OpenLightbox
* This function centers an element on the screen.
*
* Args:
* title - The title for the lightbox
* contents - The contents for the body of the lightbox
* buttonText - null to hide the button or text to a button that closes the lightbox
* callbackFunction - null or a callback to call on lightbox close.
* reloadCallback - null or a callback to call on lightbox reload (hide and show)
**/
function OpenLightbox(title,contents,buttonText, callbackFunction, reloadCallback)