rem: this.defaultWheelDown(); 
add: this.defaultWheelDown(e); 
context:     onWheelEvent: function(e){            // first determine whether or not the wheeling was inside the map        var inMap = false;        var elem = OpenLayers.Event.element(e);        while(elem != null) {            if (this.map && elem == this.map.div) {                inMap = true;                break;            }            elem = elem.parentNode;        }                if (inMap) {                        var delta = 0;            if (!e) {                e = window.event;            }            if (e.wheelDelta) {                delta = e.wheelDelta/120;                 if (window.opera) {                    delta = -delta;                }            } else if (e.detail) {                delta = -e.detail / 3;            }            if (delta) {                if (delta < 0) {                   this.defaultWheelDown();                } else {                   this.defaultWheelUp();                }            }                        //only wheel the map, not the window            OpenLayers.Event.stop(e);        }    },
meta: 8310	/local1/tlutelli/issta_data/temp/all_js/javascript/2006_temp/2006/8310/15c2ab578fabf2c24ed636bbb490243d82a68076/MouseDefaults.js/clean/lib/OpenLayers/Control/MouseDefaults.js