Javascript Clean MS Word characters - Safari problem

I'm using Javascript to clean up a textarea so that proprietary characters that MS Word likes to insert, such as Smart Quotes, are removed before submitting to the database. The code that I'm using works well on all Windows browsers and Firefox for Mac, but doesn't work on Safari - Mac. Could someone please help with suggestions or alternatives?


Here's the .js code.

Thanks

var swapCodes   = new Array(8211, 8212, 8216, 8217, 8220, 8221, 8226, 8230); // dec codes from char at
var swapStrings = new Array("--", "--", "'",  "'",  '"',  '"',  "*",  "...");
function cleanWordClipboard(input) {
// debug for new codes
// for (i = 0; i < input.length; i++)
//alert("'" + input.charAt(i) + "': " + input.charCodeAt(i));
  var output = input;
  for (i = 0; i < swapCodes.length; i++) {
    var swapper = new RegExp("\\u" + swapCodes[i].toString(16), "g"); // hex codes
    output = output.replace(swapper, swapStrings[i]);
  }
  return output;
}
function cleanWord(){
  var t = document.getElementsByTagName("textarea");
  var i;
  for(i=0;i<t.length;i++){
    t[i].value = cleanWordClipboard(t[i].value);
  }
}