function URLEncode (clearString) {
  var output = '';
  var x = 0;
  clearString = clearString.toString();
  var regex = /(^[a-zA-Z0-9_.]*)/;
  while (x < clearString.length) {
    var match = regex.exec(clearString.substr(x));
    if (match != null && match.length > 1 && match[1] != '') {
        output += match[1];
      x += match[1].length;
    } else {
      if (clearString[x] == ' ')
        output += '+';
      else {
        var charCode = clearString.charCodeAt(x);
        var hexVal = charCode.toString(16);
        output += '%' + ( hexVal.length < 2 ? '0' : '' ) + hexVal.toUpperCase();
      }
      x++;
    }
  }
  return output;
}

function submitOnEnter( object, form, _function )
{
    object.onkeypress = function( evt ){
        evt = window.event || evt;
        keyCode = evt.charCode || evt.keyCode;
        if( keyCode == 13 )
        {
            if ( form != null || form != undefined )
            {
                form.submit();
            }
            if ( _function != null || _function != undefined )
            {
                eval(_function);
            }
        }
    }
}