/**
     * This is a small polyfill to get event listeners to be
     * the same for all browsers.
     */
    if(!Element.prototype.addEventListener){var oListeners={};function runListeners(oEvent){if(!oEvent){oEvent=window.event}for(var lstId=0,elId=0,oEvtListeners=oListeners[oEvent.type];elId<oEvtListeners.aEls.length;elId++){if(oEvtListeners.aEls[elId]===this){for(lstId;lstId<oEvtListeners.aEvts[elId].length;lstId++){oEvtListeners.aEvts[elId][lstId].call(this,oEvent)}break}}}Element.prototype.addEventListener=function(sEventType,fListener){if(oListeners.hasOwnProperty(sEventType)){var oEvtListeners=oListeners[sEventType];for(var nElIdx=-1,elId=0;elId<oEvtListeners.aEls.length;elId++){if(oEvtListeners.aEls[elId]===this){nElIdx=elId;break}}if(nElIdx===-1){oEvtListeners.aEls.push(this);oEvtListeners.aEvts.push([fListener]);this["on"+sEventType]=runListeners}else{var aElListeners=oEvtListeners.aEvts[nElIdx];if(this["on"+sEventType]!==runListeners){aElListeners.splice(0);this["on"+sEventType]=runListeners}for(var lstId=0;lstId<aElListeners.length;lstId++){if(aElListeners[lstId]===fListener){return}}aElListeners.push(fListener)}}else{oListeners[sEventType]={aEls:[this],aEvts:[[fListener]]};this["on"+sEventType]=runListeners}};Element.prototype.removeEventListener=function(sEventType,fListener){if(!oListeners.hasOwnProperty(sEventType)){return}var oEvtListeners=oListeners[sEventType];for(var nElIdx=-1,elId=0;elId<oEvtListeners.aEls.length;elId++){if(oEvtListeners.aEls[elId]===this){nElIdx=elId;break}}if(nElIdx===-1){return}for(var lstId=0,aElListeners=oEvtListeners.aEvts[nElIdx];lstId<aElListeners.length;lstId++){if(aElListeners[lstId]===fListener){aElListeners.splice(lstId,1)}}}}