function showShadowBoxPopup(urlToShow, width, height){
	
	if(width == undefined){
		width = 350;
		}
	if(height == undefined){
		height = 350;
		}

    // open a welcome message as soon as the window loads
    Shadowbox.open({
        content:    urlToShow,
        player:     "iframe",
        title:      "",
        height:     height,
        width:      width
    });

};