String.prototype.t2s=function (){
var k='';
for(var i=0;i<this.length;i++) k+=(t.indexOf(this.charAt(i))==-1)?this.charAt(i):s.charAt(t.indexOf(this.charAt(i)))
return k;
}
}
function s2t(){
  document.body.innerHTML=document.body.innerHTML.s2t();
}
function t2s(){
  document.body.innerHTML=document.body.innerHTML.t2s();
}