function showDialog(url)
{
    var options = SP.UI.$create_DialogOptions();
	options.width = 650;
	options.height = 450;
    options.url = url;
    options.allowMaximize = true,
    
    SP.UI.ModalDialog.showModalDialog(options);
}

function showDialog(url, w, h)
{
    var options = SP.UI.$create_DialogOptions();
	options.width = w;
	options.height = h;
    options.url = url;
    options.allowMaximize = true,
    
    SP.UI.ModalDialog.showModalDialog(options);
}