function showPopupDialog(_url, _title) { var html = '<div style="text-align:center; margin-left:auto; margin-right:auto;padding:10px;"><img align="middle" alt="login" src="'+_url+'"/></span>';
var popup = new Liferay.Popup( { message:html, header: _title, position:['center', 10], modal:true, width:640, height:550 } );}

function showHTMLPagePopup(_url, _title, _width, _height) {
var popup = new Liferay.Popup( { url:_url, header: _title, position:['center', 10], modal:true, width:_width, height:_height } );

}