// JavaScript Document
function openWindow(URL, width, height, center) {
  xposition=0; yposition=0; 
    if ((parseInt(navigator.appVersion) >= 4 ) && (center)){ 
        xposition = (screen.width - width) / 2; 
        yposition = (screen.height - height) / 2; 
    } 
    args = "width=" + width + "," 
    + "height=" + height + "," 
	+ "title=Museo de la Casa Rosada,"
    + "location=0," 
    + "menubar=0," 
    + "resizable=0," 
    + "scrollbars=0," 
    + "status=0," 
    + "titlebar=0," 
    + "toolbar=0," 
    + "hotkeys=0," 
    + "screenx=" + xposition + ","  //NN 
    + "screeny=" + yposition + ","  //NN 
    + "left=" + xposition + ","     //IE 
    + "top=" + yposition;           //IE 

window.open( URL , null , args ); 
}