whole_func_string: function() {
              return Math.max(!Ext.isStrict ? document.body.scrollHeight : document.documentElement.scrollHeight, this.getViewportHeight());
          }
func_code_string: function() {
              return Math.max(!Ext.isStrict ? document.body.scrollHeight : document.documentElement.scrollHeight, this.getViewportHeight());
          }
func_documentation_string: Retrieves the document height
  @static
  @return {Number} documentHeight