JavaScript implements Chinese symbol conversion English symbol

Because of the program design, many times we want the user to input something for the English symbol, we can give users a hint, but we do not guarantee that they will comply with, so the use of JS to convert Chinese symbols for English symbols became urgent need.

function Changedouhao (str) {
Str=str.replace (/,/ig, ', ');
return str;
}
This is an example of converting a comma, using a regular string substitution, which is equally

function Changewenhao (str) {
Str=str.replace (/? /ig, '? ');
return str;
}

So we are not afraid of users to enter the random

Just saw a post, is the translation of all English symbols into Chinese

<SCRIPT   language= "JavaScript" >  
  <!--  
  function& nbsp;  Meizz (str)   
  {  
      var   tmp& nbsp;  =   ';  
      for (var   i=0;i< str.length;i++)   
      {  
           tmp   +=   String.fromCharCode (str.charcodeat (i) +65248)   
     }  
      return   tmp   
 }  
  alert (meizz (' abcdefghijklmnopqrstuvwxyz1234567890 '));  
& nbsp Alert (Meizz (' ~ '!@#$%^&* () _+|-={}[]: ";<>?,./\\\"));  
 //-->  
  </script>
can you write a way to translate Chinese symbols into English symbols

Note: In addition to JS can be cast so we can also use such as PHP or java,asp.net can be converted to the