String.prototype.trim = function() {
	return this.replace(/^\s*|\s*$/g,"");
}
var Try = {
  these: function() {
    var returnValue;
    for (var i = 0; i < arguments.length; i++) {
      var lambda = arguments[i];
      try {
        returnValue = lambda();
        break;
      } catch (e) {}
    }
    return returnValue;
  }
}
function httpRequest(){
     return Try.these(
       function() {return new ActiveXObject('Msxml2.XMLHTTP')},
       function() {return new ActiveXObject('Microsoft.XMLHTTP')},
       function() {return new XMLHttpRequest()}
     ) || false;
}
var req=httpRequest();