function ch1(x){
  var yy=2;
  var z=0;
  var xx="";
  for(var y=0;y<x.length;y++){
	  z=x.charCodeAt(y);
	  xx+=String.fromCharCode(z-yy);
	  }
  return xx;
  }
function wtk(x){
  location.href=ch1(x);
  }