/* Delegate functions for prototype.js version 1.6
    2008 Ken Snyder (kendsnyder@gmail.com)
    under the creative commons attribution license v3.0 (http://creativecommons.org/licenses/by/3.0/)
!*/
Object.extend(Event,(function(){var cache={};return{delegate:function(element,eventName){if(arguments[3]){var rules={};rules[arguments[2]]=arguments[3];}else{var rules=Object.extend({},arguments[2]);}var el=$(element),ev=eventName,id=el.identify?el.identify():"document";if(!cache[id]){cache[id]={"$observer":function(event){var el=event.element();if(cache[id][event.type]){for(var i=0,len=cache[id][event.type].length;i<len;i++){for(var selector in cache[id][event.type][i]){if(el&&cache[id][event.type][i][selector][1].match(el)){cache[id][event.type][i][selector][0](event);}}}}}};}if(!cache[id][ev]){cache[id][ev]=[];el.observe(ev,cache[id]["$observer"]);}for(var selectorStr in rules){rules[selectorStr]=[rules[selectorStr],new Selector(selectorStr)];}cache[id][ev].push(rules);return el;},stopDelegating:function(element,eventName){if(element===undefined){for(var id in cache){Event.stopDelegating(id=="$document"?document:id);}cache={};return true;}if(Object.isString(arguments[2])){var rules={};rules[arguments[2]]=true;}else{if(arguments[2]){var rules=arguments[2];}else{var rules=false;}}var el=$(element),ev=eventName,id=el.identify?el.identify():"$document";if(cache[id]){if(ev&&cache[id][ev]){for(var i=0,len=cache[id][ev].length;i<len;i++){if(rules){for(var selector in rules){delete cache[id][ev][i][selector];}}if(!rules||$H(cache[id][ev][i]).any()==false){el.stopObserving(ev,cache[id]["$observer"]);cache[id][ev][i]="r";}}cache[id][ev]=cache[id][ev].without("r");}else{for(var evName in cache[id]){if(evName!="$observer"){el.stopObserving(evName,cache[id]["$observer"]);}}delete cache[id];}}return el;}};})());Element.addMethods({delegate:Event.delegate,stopDelegating:Event.stopDelegating});document.delegate=Event.delegate.curry(document);document.stopDelegating=Event.stopDelegating.curry(document);Event.observe(window,"unload",Event.stopDelegating);