var posab,poswhy,posadv;
function hid(){
  if(document.layers){	
	  document.why.visibility="hidden"
	  document.adv.visibility="hidden"
	  document.about.visibility="hidden"

 }

  if(document.all){

	  document.all.why.style.visibility="hidden"
	  document.all.adv.style.visibility="hidden"
	  document.all.about.style.visibility="hidden"
	  

  }

  if(!document.all && document.getElementById){

      document.getElementById("why").style.visibility="hidden"
	  document.getElementById("adv").style.visibility="hidden"
	  document.getElementById("about").style.visibility="hidden"


  }	
}



function hidab(){
  if(document.layers){	

	  document.adv.visibility="hidden"
	  document.why.visibility="hidden"

 }

  if(document.all){
	  document.all.adv.style.visibility="hidden"
	  document.all.why.style.visibility="hidden"
	  

  }

  if(!document.all && document.getElementById){

	  document.getElementById("adv").style.visibility="hidden"
	  document.getElementById("why").style.visibility="hidden"


  }	
}









function hidpro(){
  if(document.layers){	

	  document.adv.visibility="hidden"
	  document.about.visibility="hidden"
	  

 }

  if(document.all){
	  document.all.adv.style.visibility="hidden"
	  document.all.about.style.visibility="hidden"
	  

  }

  if(!document.all && document.getElementById){

	  document.getElementById("adv").style.visibility="hidden"
	  document.getElementById("about").style.visibility="hidden"


  }	
}


function hidadv(){
  if(document.layers){	
	  document.why.visibility="hidden"
	  document.about.visibility="hidden"


 }

  if(document.all){

	  document.all.why.style.visibility="hidden"
	  document.all.about.style.visibility="hidden"

	  

  }

  if(!document.all && document.getElementById){

      document.getElementById("why").style.visibility="hidden"
      document.getElementById("about").style.visibility="hidden"



  }	
}



function ab(){
  if(document.layers)
  {
	  document.about.visibility="visible"
 }

  if(document.all)
  {  
	  document.all.about.style.visibility="visible";
	  posab=document.getElementById("about").style.left;
	   poswhy=document.getElementById("why").style.left;
	    posadv=document.getElementById("adv").style.left;
	  //document.getElementById("about").style.left=276+"px";
  }

  if(!document.all && document.getElementById)
  {  
      document.getElementById("about").style.visibility="visible";
	  //document.getElementById("about").style.left=285+"px";
	document.getElementById("about").style.left=posab;
  }

}






function wh(){
  if(document.layers){
	  document.why.visibility="visible"

 }

  if(document.all)
  {
	  document.all.why.style.visibility="visible";
	  poswhy=document.getElementById("why").style.left;
	 // document.getElementById("why").style.left=276+"px";
	 document.getElementById("why").style.left=poswhy;
  }

  if(!document.all && document.getElementById)
  {
      document.getElementById("why").style.visibility="visible";
		poswhy=document.getElementById("why").style.left;
	// document.getElementById("why").style.left=285+"px";
	document.getElementById("why").style.left=poswhy;
  }

}


function ad(){
  if(document.layers){
	  document.adv.visibility="visible";

 }

  if(document.all)
  {
	  document.all.adv.style.visibility="visible";
	  posadv=document.getElementById("adv").style.left;
	 //document.getElementById("adv").style.left=276+"px";
	 document.getElementById("adv").style.left=posadv;
  }

  if(!document.all && document.getElementById)
  {
      document.getElementById("adv").style.visibility="visible";
      posadv=document.getElementById("adv").style.left;
	 // document.getElementById("adv").style.left=285+"px";
	 document.getElementById("adv").style.left=posadv;
  }

}