function showDM(f){
 if(f){visi="visible";}
 else{visi="hidden";}
 if(document.layers){document.DM.visibility=visi;}
 if(document.all){document.all.DM.style.visibility=visi;}
 if(document.getElementById){document.getElementById("DM").style.visibility=visi;}
 } 
 
 function showCM(f){
 if(f){visi="visible";}
 else{visi="hidden";}
 if(document.layers){document.CM.visibility=visi;}
 if(document.all){document.all.CM.style.visibility=visi;}
 if(document.getElementById){document.getElementById("CM").style.visibility=visi;}
 } 
 
 function showHAS(f){
 if(f){visi="visible";}
 else{visi="hidden";}
 if(document.layers){document.HAS.visibility=visi;}
 if(document.all){document.all.HAS.style.visibility=visi;}
 if(document.getElementById){document.getElementById("HAS").style.visibility=visi;}
 } 

 function showCCS(f){
 if(f){visi="visible";}
 else{visi="hidden";}
 if(document.layers){document.CCS.visibility=visi;}
 if(document.all){document.all.CCS.style.visibility=visi;}
 if(document.getElementById){document.getElementById("CCS").style.visibility=visi;}
 } 
 
 function showAU(f){
 if(f){visi="visible";}
 else{visi="hidden";}
 if(document.layers){document.AU.visibility=visi;}
 if(document.all){document.all.AU.style.visibility=visi;}
 if(document.getElementById){document.getElementById("AU").style.visibility=visi;}
 }