Promise.when = function(){
var p = new _promise
fns = Array.prototype.slice.call(arguments,0)
fn.map(fns,function(fnc){
p.wait(fnc)
})
fns[0].call(p)
return p
}
_accept :function(action , data){
if (!this._ondone.length && !this._onfail.length){
var self = this
window.setTimeout(function(){
self[action].apply(self ,data)
} , 0)
return
}
if ('resolve' == action && this._waits.length){
var fnc = this._waits.shift()
fnc.apply(this , data )
return
}
fn.map('resolve' == action ? this._ondone : this._onfail,function(fnc){
fnc.apply(null , data)
})
this._clear()
},