// JavaScript Document
 function showcontacts () {
 
if (navigator.appName=="Netscape") 
      document.layers['contacts'].visibility = "show"; 
     else 
      document.all['contacts'].style.visibility = "visible"; 
}

function hidecontacts() {
 
if (navigator.appName=="Netscape") 
      document.layers['contacts'].visibility = "hide"; 
     else 
      document.all['contacts'].style.visibility = "hidden"; 
}
function showservice() {
 
if (navigator.appName=="Netscape") 
      document.layers['service'].visibility = "show"; 
     else 
      document.all['service'].style.visibility = "visible"; 
}

function hideservice() {
 
if (navigator.appName=="Netscape") 
      document.layers['service'].visibility = "hide"; 
     else 
      document.all['service'].style.visibility = "hidden"; 
}
function showtech() {
 
if (navigator.appName=="Netscape") 
      document.layers['tech'].visibility = "show"; 
     else 
      document.all['tech'].style.visibility = "visible"; 
}

function hidetech() {
 
if (navigator.appName=="Netscape") 
      document.layers['tech'].visibility = "hide"; 
     else 
      document.all['tech'].style.visibility = "hidden"; 
}


function showinfra() {
 
if (navigator.appName=="Netscape") 
      document.layers['infra'].visibility = "show"; 
     else 
      document.all['infra'].style.visibility = "visible"; 
}

function hideinfra() {
 
if (navigator.appName=="Netscape") 
      document.layers['infra'].visibility = "hide"; 
     else 
      document.all['infra'].style.visibility = "hidden"; 
}
function showfb() {
 
if (navigator.appName=="Netscape") 
      document.layers['fb'].visibility = "show"; 
     else 
      document.all['fb'].style.visibility = "visible"; 
}

function hidefb() {
 
if (navigator.appName=="Netscape") 
      document.layers['fb'].visibility = "hide"; 
     else 
      document.all['fb'].style.visibility = "hidden"; 
}