var tabs=function(){function tag(name,elem){return(elem||document).getElementsByTagName(name);}
function id(name){return document.getElementById(name);}
function first(elem){elem=elem.firstChild;return elem&&elem.nodeType==1?elem:next(elem);}
function next(elem){do{elem=elem.nextSibling;}while(elem&&elem.nodeType!=1)
return elem;}
return{set:function(elemId,tabId){var elem=tag("li",id(elemId));var tabs=tag("ul",id(tabId));var listNum=elem.length;var tabNum=tabs.length;for(var i=0;i<listNum;i++){elem[i].onclick=(function(i){return function(){for(var j=0;j<tabNum;j++){if(i==j){tabs[j].style.display="block";elem[j].firstChild.className="selected";}
else{tabs[j].style.display="none";elem[j].firstChild.className="";}}}})(i)}}}}();tabs.set("nav","menu_con");