Javascript file path shortener. Depends on jQuery.

gistfile1.js

$(document).ready(function () {
  var str = "H:\\Informatique\\Personnalisation\\Icones\\__\\Crystal GT PNG Pack\\Applications\\licq.png";
  var maxLength = 25;

  var tokens = str.split("\\");
  var drive = tokens[0];
  var fileName = tokens[tokens.length - 1];
  var len = drive.length + fileName.length;
  //remove the current lenth and also space for 3 dots and 2 slashes
  var remLen = maxLength - len - 5;

  //if remLen < 0, then it will over flow our maxLength to still maintain drive and filename
  if (remLen > 0) {
    //remove first and last elements from the array
    tokens.splice(0, 1);
    tokens.splice(tokens.length - 1, 1);
    //recreate our path
    var path = tokens.join("\\");
    //handle the case of an odd length
    var lenA = Math.ceil(remLen / 2);
    var lenB = Math.floor(remLen / 2);
    //rebuild the path from beginning and end
    var pathA = path.substring(0, lenA);
    var pathB = path.substring(path.length - lenB);
    path = drive + "\\" + pathA + "..." + pathB + "\\" + fileName;
    
    //write it out
    $("body").html("Orig. Path: " + str + "<br /><br />" +
      "New Path: " + path + "<br /><br />" +
      "MaxLength: " + maxLength + "<br /><br />" +
      "New Length: " + path.length);
  } else {
    
    //try and fit our maxlength by taking only drive and filename
    $("body").html("Orig. Path: " + str + "<br /><br />" +
      "New Path: " + drive + "\\" + fileName + "<br /><br />" +
      "MaxLength: " + maxLength + "<br /><br />" +
      "New Length: " + (len + 1) + "<br /><br />");
  }
});