add: if (!lonLat) {  return; } 
context:     redraw: function(evt) {        var lonLat;        if (evt == null) {            lonLat = new OpenLayers.LonLat(0, 0);        } else {            if (this.lastXy == null ||                Math.abs(evt.xy.x - this.lastXy.x) > this.granularity ||                Math.abs(evt.xy.y - this.lastXy.y) > this.granularity)            {                this.lastXy = evt.xy;                return;            }            lonLat = this.map.getLonLatFromPixel(evt.xy);            this.lastXy = evt.xy;        }                var digits = parseInt(this.numdigits);        var newHtml =            this.prefix +            lonLat.lon.toFixed(digits) +            this.separator +             lonLat.lat.toFixed(digits) +            this.suffix;        if (newHtml != this.element.innerHTML) {            this.element.innerHTML = newHtml;        }    },
meta: 1027	/local1/tlutelli/issta_data/temp/all_js/javascript/2007_temp/2007/1027/354817649d00045586c3c11ef46ddc04d4fd6120/MousePosition.js/clean/lib/OpenLayers/Control/MousePosition.js