function windowOpener(windowWidth, windowHeight, windowUri, windowName){
    var centerWidth = (window.screen.width - windowWidth) / 2;
    var centerHeight = (window.screen.height - windowHeight) / 2;

    newWindow = window.open(windowUri, windowName, 'resizable=0,width=' + windowWidth +
        ',height=' + windowHeight +
        ',left=' + centerWidth +
        ',top=' + centerHeight);

    newWindow.focus();
    return false;
}