myprototype.js

// Prototype extra javascript stuff
// http://alcides.ideias3.com

Position.GetWindowSize = function(w) {
	var width, height;
        w = w ? w : window;
        this.width = w.innerWidth || (w.document.documentElement.clientWidth || w.document.body.clientWidth);
        this.height = w.innerHeight || (w.document.documentElement.clientHeight || w.document.body.clientHeight);
        
        return this;
}

String.prototype.trim = function() {
	return this.replace(/^\s+|\s+$/g,"");
}

Array.prototype.haskey = function(item) {
  var j = 0;
   while (j < this.length) {
      if (this[j] == item) {
          return true;
      } else { j++; }
   }
   return false;
}