function waitPreloadPage() { //DOM
if (document.getElementById){
document.getElementById('prepage').style.visibility='hidden';
}else{
if (document.layers){ //NS4
document.prepage.visibility = 'hidden';
}
else { //IE4
document.all.prepage.style.visibility = 'hidden';
}
}
}

 function displ(nmdiv){if (document.getElementById){
if (document.getElementById(nmdiv).style.display=='none') document.getElementById(nmdiv).style.display ='block';
else document.getElementById(nmdiv).style.display ='none';} else if (document.all)
{ if(document.all[nmdiv].style.display=='none') document.all[nmdiv].style.display ='block';
else document.all[nmdiv].style.display ='none';}}

  
var val1='dvid1';
function ctdispl(nmdiv){
if (document.getElementById){
if (document.getElementById(nmdiv).style.display=='none') 
{document.getElementById(nmdiv).style.display ='block';
  document.getElementById(val1).style.display ='none';
}
else document.getElementById(nmdiv).style.display ='none';
} 
else if (document.all)
{ if(document.all[nmdiv].style.display=='none') 
{document.all[nmdiv].style.display ='block';
document.getElementById(val1).style.display ='none';
}
else document.all[nmdiv].style.display ='none';}
if (val1!=nmdiv) {val1=nmdiv;} else val1='dvid1';
}