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 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 hidabout()
{
  if(document.layers)
  {	
	  document.why.visibility="hidden"
	  document.adv.visibility="hidden"
 }

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

  if(!document.all && document.getElementById)
  {
      document.getElementById("why").style.visibility="hidden"
	  document.getElementById("adv").style.visibility="hidden"
  }	
}

function wh()
{
	//alert('why');
  if(document.layers)
  {
	  document.why.visibility="visible"
 }

  if(document.all)
  {
	  document.all.why.style.visibility="visible";
	  poswhy=-3;
	 // document.getElementById("why").style.left=270+"px";
	  document.getElementById("why").style.left=poswhy;
  }

  if(!document.all && document.getElementById)
  {
      document.getElementById("why").style.visibility="visible"
	  //document.getElementById("why").style.left=283+"px";
	   document.getElementById("why").style.left=poswhy;
  }
}


function ad(){
	//alert('ad');
  if(document.layers){
	  document.adv.visibility="visible"
 }

  if(document.all)
  {
	  document.all.adv.style.visibility="visible"
	  //document.getElementById("adv").style.left=270+"px";
	  	document.getElementById("adv").style.left=posadv;
  }

  if(!document.all && document.getElementById)
  {
      document.getElementById("adv").style.visibility="visible"
	  //document.getElementById("adv").style.left=283+"px";
	   document.getElementById("adv").style.left=posadv;
  }
}


function ab(){
	//alert('ab');
  if(document.layers)
  {
	  document.why.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=270+"px";
  }

  if(!document.all && document.getElementById)
  {
      document.getElementById("about").style.visibility="visible"

	 // document.getElementById("about").style.left=283+"px";
	 document.getElementById("about").style.left=posab;

  }

}