prepareIE: function(height, overflow){
            bod = document.getElementsByTagName('body')[0];
            bod.style.height = height;
            bod.style.overflow = overflow;
 
            htm = document.getElementsByTagName('html')[0];
            htm.style.height = height;
            htm.style.overflow = overflow;
      },

      hideSelects: function(visibility){
           selects = document.getElementsByTagName('select');
           for(i = 0; i < selects.length; i++) {
                   selects[i].style.visibility = visibility;
            }
      },

      getScroll: function(){
            if (self.pageYOffset) {
                    this.yPos = self.pageYOffset;
            } else if (document.documentElement && document.documentElement.scrollTop){
                    this.yPos = document.documentElement.scrollTop;
            } else if (document.body) {
                    this.yPos = document.body.scrollTop;
            }
      },

      setScroll: function(x, y){
            window.scrollTo(x, y);
      },