types = "hidden";
function pullDownMenu(tagName,x,y)
{if (types == 'hidden') types = 'visible'; else types = 'hidden';
if (document.layers)   document.layers[tagName].visibility    = types;
if (document.all)      document.all(tagName).style.visibility = types;}
function ok(id){if(document.all(id).style.display == "none"){document.all(id).style.display="block";}else{document.all(id).style.display="none";}} 
function Mylink(sel){
mlink=sel.options[sel.selectedIndex].value;
if(mlink!="-"){
location.href=mlink;}}