function popUp(url,name,width, height,scrollbar){

    var left = (screen.availWidth - width) / 2;
    var top = (screen.availHeight - height) / 2;
   
    var features = 
    	      "fullscreen=" + 0 +
                 ",toolbar=" + 0 +
                 ",location=" + 0 +
                 ",status=" + 0 +
                 ",menubar=" + 0 +
                 ",scrollbars=" + scrollbar +
                 ",resizable=" + 0 +
                 ",width=" + width +
                 ",height=" + height +
                 ",left=" + left +
                 ",top=" + top;
                  
   window.open(url,name,features);	
}