iluminada1 = new Image(100,25)
   iluminada1.src = "images/home_press.gif"
   apagada1 = new Image(100,25)
   apagada1.src = "images/home.gif"
   
   iluminada2 = new Image(100,25)
   iluminada2.src = "images/empresa_press.gif"
   apagada2 = new Image(100,25)
   apagada2.src = "images/empresa.gif"
   
   iluminada3 = new Image(100,25)
   iluminada3.src = "images/serv_press.gif"
   apagada3 = new Image(100,25)
   apagada3.src = "images/serv.gif"
   
   iluminada4 = new Image(100,25)
   iluminada4.src = "images/port_press.gif"
   apagada4 = new Image(100,25)
   apagada4.src = "images/port.gif"
   
   iluminada5 = new Image(100,25)
   iluminada5.src = "images/contato_press.gif"
   apagada5 = new Image(100,25)
   apagada5.src = "images/contato.gif"
   
   
   <!--correcao de png -->
<!--
function correctPNG() // correctly handle PNG transparency in Win IE 5.5 & 6.
{
   var arVersion = navigator.appVersion.split("MSIE")
   var version = parseFloat(arVersion[1])
   if ((version >= 5.5) && (document.body.filters))
   {
      for(var i=0; i<document.images.length; i++)
      {
         var img = document.images[i]
         var imgName = img.src.toUpperCase()
         if (imgName.substring(imgName.length-3, imgName.length) == "PNG")
         {
            var imgID = (img.id) ? "id='" + img.id + "' " : ""
            var imgClass = (img.className) ? "class='" + img.className + "' " : ""
            var imgTitle = (img.title) ? "title='" + img.title + "' " : "title='" + img.alt + "' "
            var imgStyle = "display:inline-block;" + img.style.cssText
            if (img.align == "left") imgStyle = "float:left;" + imgStyle
            if (img.align == "right") imgStyle = "float:right;" + imgStyle
            if (img.parentElement.href) imgStyle = "cursor:hand;" + imgStyle
            var strNewHTML = "<span " + imgID + imgClass + imgTitle
            + " style=\"" + "width:" + img.width + "px; height:" + img.height + "px;" + imgStyle + ";"
            + "filter:progid:DXImageTransform.Microsoft.AlphaImageLoader"
            + "(src=\'" + img.src + "\', sizingMethod='scale');\"></span>"
            img.outerHTML = strNewHTML
            i = i-1
         }
      }
   }   
}
window.attachEvent("onload", correctPNG);

function MM_openBrWindow(theURL,winName,features) { //v2.0
  window.open(theURL,winName,features);
}
//-->

<!--correcao de png -->