巡り巡ってElement.prototypeを断念。。namespace使ってbind、unbindできる(IE8以下を除く)

bind and unbind funcs

/* 
 * bind, unbind
 * 
 * @author    : nori([email protected])
 * @copyright : 5509(http://5509.me/)
 * @license   : The MIT License
 * @modified  : 2011-04-09 01:30
 *
 * HOW TO USE
 * bind event          : bind(elm, type, func) or bind(elm, {})
 * bind event.name     : bind(elm, type.name, func)
 * unbind all events   : unbind(elm)
 * unbind events(type) : unbind(elm, type)
 * unbind event.name   : unbind(elm, type.name)
 */
YOURNAMESPACE.bind = function() {
	var i, _a = arguments;
	if ( typeof _a[1] === "object" ) {
		for ( i in _a[1] ) {
			bindFunc(i, _a[1][i]);
		}
	} else {
		bindFunc(_a[1], _a[2]);
	}
	function bindFunc(type, func) {
		var i;
		type = type.split(" ");
		for ( i = 0, l = type.length; i < l; i++ ) {
			if ( type[i].indexOf(".") !== -1 ) {
				type[i] = type[i].split(".");
				_a[0]["bindedNamed"] = _a[0]["bindedNamed"] || {};
				_a[0]["bindedNamed"][type[i][0]] = _a[0]["bindedNamed"][type[i][0]] || {};
				_a[0]["bindedNamed"][type[i][0]][type[i][1]] = func;
				_a[0].addEventListener(type[i][0], func, false);
			} else {
				_a[0]["binded"] = _a[0]["binded"] || {};
				_a[0]["binded"][type] = _a[0]["binded"][type] || [];
				_a[0]["binded"][type][_a[0]["binded"][type].length] = func;
				_a[0].addEventListener(type[i], func, false);
			}
		}
	}
}
YOURNAMESPACE.unbind = function(elm, type) {
	var i = 0, c, d, bindedTypes, bindedEvents, bindedNamedEvents;
	if ( !type ) {
		if ( elm["binded"] ) {
			bindedTypes = elm["binded"];
			for ( c in bindedTypes ) {
				bindedEvents = bindedTypes[c];
				while ( bindedEvents[i] ) {
					elm.removeEventListener(c, bindedEvents[i], false);
					bindedEvents.splice(i, i + 1);
				}
			}
		}
		bindedNamedEvents = elm["bindedNamed"];
		if ( !bindedNamedEvents ) return false;
		for ( c in bindedNamedEvents ) {
			for ( d in bindedNamedEvents[c] ) {
				elm.removeEventListener(c, bindedNamedEvents[c][d], false);
			}
			delete bindedNamedEvents[c];
		}
	} else
	if ( type.indexOf(".") !== -1 ) {
		type = type.split(".");
		elm.removeEventListener(type[0], elm["bindedNamed"][type[0]][type[1]], false);
	} else {
		if ( elm["binded"] && elm["binded"][type] ) {
			bindedEvents = elm["binded"][type];
			while ( bindedEvents[i] ) {
				elm.removeEventListener(type, bindedEvents[i], false);
				bindedEvents.splice(i, i + 1);
			}
		}
		bindedNamedEvents = elm["bindedNamed"][type];
		if ( !bindedNamedEvents ) return false;
		for ( c in bindedNamedEvents ) {
			elm.removeEventListener(type, bindedNamedEvents[c], false);
		}
		delete bindedNamedEvents;
	}
}