www.pudn.com > tree.rar > imagequeue.js

function _eventBanding(o, event, cb){ 
	if(o.addEventListener){ 
		o.addEventListener(event, cb, false); 
	} 
	else{ 
		o.attachEvent("on" + event, cb); 
	} 
} 
function RayeImageQueue(timeOut){ 
	this.loadingImage = null; 
	this.queue = Array(); 
	this.timeOut = timeOut || 2000; 
	this.loading = false; 
	this.current = -1; 
	this.timeHandle = null; 
	this.failure = false; 
} 
var __p = RayeImageQueue.prototype; 
__p.start = function(){ 
	if(false == this.loading){ 
		if(this.current < this.queue.length - 1){ 
			this.current ++; 
			this.loading = true; 
			this.failure = false; 
			this.loadingImage = new Image; 
			var co = this.queue[this.current]; 
			var io = this.loadingImage; 
			var oThis = this; 
var lc = function(){ 
var tcb = function(w, h){ 
	if(null == co.param){ 
		co.cb(w, h); 
	} 
	else{ 
		co.cb(co.param, w, h); 
	} 
}; 
if(false == co.loaded){ 
	if(oThis.failure){ 
		tcb(-1, -1); 
	} 
	else{ 
		clearTimeout(oThis.timeHandle); 
		tcb(io.width, io.height); 
	} 
	co.loaded = true; 
} 
delete io; 
io = null; 
oThis.loading = false; 
setTimeout(function(){ 
	oThis.start(); 
} 
, 100); 
}; 
_eventBanding(this.loadingImage, "load", lc); 
io.src = co.src; 
this.timeHandle = setTimeout(function(){ 
	oThis.failure = true; 
	lc(); 
} 
,this.timeOut); 
} 
} 
} 
__p.clear = function(){ 
	this.queue = Array(); 
	this.loading = false; 
	this.current = -1; 
	clearTimeout(this.timeHandle); 
	this.timeHandle = null; 
} 
__p.addQueue = function(src, cb, param){ 
	if(!/\:\/\//.test(src)){ 
	if(src.substr(0,1) == "/"){ 
		src = "http://" + location.host + src; 
	} 
	else{ 
		var p = location.href; 
		p = p.substr(0, p.lastIndexOf("/") + 1); 
		src = p + src; 
	} 
} 
this.queue[this.queue.length] ={ 
	src:src, cb:cb, param:param || null, loaded:false 
}; 
this.start(); 
}