var Browser_Ok = ( ( ( navigator.appName == "Netscape" ) && ( parseInt( navigator.appVersion ) >= 3 ) ) || ( ( navigator.appName == "Microsoft Internet Explorer" ) && ( parseInt( navigator.appVersion ) >= 4 ) ) ) 
function SH_section( idTab ){ 
 var targetElement = document.getElementById( idTab ); 
   if ( "none" == targetElement.style.display){ 
    targetElement.style.display = ""; 
   } else{ 
    targetElement.style.display = "none"; 
   } 
}