function popImage(imageURL,imageTitle)
{
var width = 400;
var height = 300;
var left = parseInt((screen.availWidth/2) - (width/2));
var top = parseInt((screen.availHeight/2) - (height/2));
window.open(imageURL , "ventana1" , "width=" + width + ",height=" + height + ",status,resizable,left=" + left + ",top=" + top + "screenX=" + left + ",screenY=" + top+"scrollbars=NO") ;
}