Char to ascii in javascript

 function ascii_value (c)  
 {  
      // restrict input to a single character  
      c = c . charAt (0);  
      // loop through all possible ASCII values  
      var i;  
      for (i = 0; i < 256; ++ i)  
      {  
           // convert i into a 2-digit hex string  
           var h = i . toString (16);  
           if (h . length == 1)  
                h = "0" + h;  
           // insert a % character into the string  
           h = "%" + h;  
           // determine the character represented by the escape code  
           h = unescape (h);  
           // if the characters match, we've found the ASCII value  
           if (h == c)  
                break;  
      }  
      return i;  
 }  

References:

 Rose, Charlton. "converting between characters and ASCII values." http://sharkysoft.com. 3 Jan 1997. Web. 2 Nov 2010. <http://sharkysoft.com/tutorials/jsa/content/018.html>.