if (document.all) { 
    brow="document.all";          
    parA="[\""; 
    parB="\"]"; 
    styleRef=".style.visibility"; 
    testH="\"hidden\""; 
    testS="\"visible\""; 
   } 
  else if (document.layers){ //NN4 
    brow="document.layers"; 
    parA="[\""; 
    parB="\"]"; 
    styleRef=".visibility"; 
    testH="\"hide\""; 
    testS="\"show\""; 
   } 
  else if (document.getElementById) { // Opera, NN6 e FF
    brow="document.getElementById"; 
    parA="(\""; 
    parB="\")"; 
    styleRef=".style.visibility"; 
    testH="\"hidden\""; 
    testS="\"visible\""; 
       } 
 function Hide(lname){
  eval(brow+parA+lname+parB+styleRef+"="+testH+";");
 }
 function ShowL1(lname) {
 eval(brow+parA+lname+parB+styleRef+"="+testS+";");
 }

 function ShowHide(lname)  {
 if (lname!="StandL"){
 Hide("StandL")
 }
 if (lname!="RiprL"){ 
 Hide("RiprL")
 }
 if (lname!="GenL"){
 Hide("GenL")
 }
  if (lname!="GroomL"){
 Hide("GroomL")
 }
 vis=eval(brow+parA+lname+parB+styleRef+";");
 if ('"'+vis+'"'==testS) { 
 	eval(brow+parA+lname+parB+styleRef+"="+testH+";");
  }
 else if ('"'+vis+'"'==testH) {
 	 eval(brow+parA+lname+parB+styleRef+"="+testS+";");
  }
 }