if ( document.images )
{
  presentacion_on = new Image ( );
  presentacion_off = new Image ( );
  noticias_on = new Image ( );
  noticias_off = new Image ( );
  enlaces_on = new Image ( );
  enlaces_off = new Image ( );
  mapa_on = new Image ( );
  mapa_off = new Image ( );
  zonaprivada_on = new Image ( );
  zonaprivada_off = new Image ( );
  padmin_on = new Image ( );
  padmin_off = new Image ( );
  galeria_on = new Image ( );
  galeria_off = new Image ( );
  contacto_on = new Image ( );
  contacto_off = new Image ( );
  proyectos_on = new Image ( );
  proyectos_off = new Image ( );
  
  presentacion_on.src = "img/s_presentacion_b.jpg";
  presentacion_off.src = "img/s_presentacion_a.jpg";
  noticias_on.src = "img/s_noticias_b.jpg";
  noticias_off.src = "img/s_noticias_a.jpg";
  enlaces_on.src = "img/s_enlaces_b.jpg";
  enlaces_off.src = "img/s_enlaces_a.jpg";
  mapa_on.src = "img/s_mapa_b.jpg";
  mapa_off.src = "img/s_mapa_a.jpg";
  zonaprivada_on.src = "img/s_zonaprivada_b.jpg";
  zonaprivada_off.src = "img/s_zonaprivada_a.jpg";
  padmin_on.src = "img/s_admin_b.jpg";
  padmin_off.src = "img/s_admin_a.jpg";
  proyectos_on.src = "img/s_proyectos_b.jpg";
  proyectos_off.src = "img/s_proyectos_a.jpg";
  galeria_on.src = "img/s_galeria_b.jpg";
  galeria_off.src = "img/s_galeria_a.jpg";  
  contacto_on.src = "img/s_contacto_b.jpg";
  contacto_off.src = "img/s_contacto_a.jpg";  
}

function button_on ( imgName )
{
  if ( document.images )
  {
    butOn = eval ( imgName + "_on.src" );
    document[imgName].src = butOn;
  }
}

function button_off ( imgName )
{
  if ( document.images )
  {
    butOff = eval ( imgName + "_off.src" );
    document[imgName].src = butOff;
  }
}

//Función  que abre una nueva ventana estática		
function ventanaestatica(url,ancho,alto)
{
	var newwindow;
	var cadena = 'height='+alto+',width='+ancho;
	newwindow=window.open(url,'name',cadena);
	if (window.focus) {newwindow.focus()}
}


function MM_CheckFlashVersion(reqVerStr,msg){
  with(navigator){
    var isIE  = (appVersion.indexOf("MSIE") != -1 && userAgent.indexOf("Opera") == -1);
    var isWin = (appVersion.toLowerCase().indexOf("win") != -1);
    if (!isIE || !isWin){  
      var flashVer = -1;
      if (plugins && plugins.length > 0){
        var desc = plugins["Shockwave Flash"] ? plugins["Shockwave Flash"].description : "";
        desc = plugins["Shockwave Flash 2.0"] ? plugins["Shockwave Flash 2.0"].description : desc;
        if (desc == "") flashVer = -1;
        else{
          var descArr = desc.split(" ");
          var tempArrMajor = descArr[2].split(".");
          var verMajor = tempArrMajor[0];
          var tempArrMinor = (descArr[3] != "") ? descArr[3].split("r") : descArr[4].split("r");
          var verMinor = (tempArrMinor[1] > 0) ? tempArrMinor[1] : 0;
          flashVer =  parseFloat(verMajor + "." + verMinor);
        }
      }
      // WebTV has Flash Player 4 or lower -- too low for video
      else if (userAgent.toLowerCase().indexOf("webtv") != -1) flashVer = 4.0;

      var verArr = reqVerStr.split(",");
      var reqVer = parseFloat(verArr[0] + "." + verArr[2]);
  
      if (flashVer < reqVer){
        if (confirm(msg))
          window.location = "http://www.macromedia.com/shockwave/download/download.cgi?P1_Prod_Version=ShockwaveFlash";
      }
    }
  } 
}