_base.js

这是一个ajax的例子大家好好的看看就是一个鱼眼的效果

				return "https";
				break;
			default:
				return "http";
				break;
		}
	},
	
	write: function(/* Boolean? */ doExpressInstall){
		// summary: Writes the Flash into the page.
		// description:
		//	This must be called before the page
		//	is finished loading. 
		// doExpressInstall: Boolean
		//	Whether to write out Express Install
		//	information. Optional value; defaults to false.
		
		// determine our container div's styling
		var containerStyle = "";
		containerStyle += ("width: " + this.width + "px; ");
		containerStyle += ("height: " + this.height + "px; ");
		if(!this._visible){
			containerStyle += "position: absolute; z-index: 10000; top: -1000px; left: -1000px; ";
		}
		
		// figure out the SWF file to get and how to write out the correct HTML
		// for this Flash version
		var objectHTML;
		var swfloc = dojox.flash.url;
		var swflocObject = swfloc;
		var swflocEmbed = swfloc;
		var dojoUrl = dojo.baseUrl;
		if(doExpressInstall){
			// the location to redirect to after installing
			var redirectURL = escape(window.location);
			document.title = document.title.slice(0, 47) + " - Flash Player Installation";
			var docTitle = escape(document.title);
			swflocObject += "?MMredirectURL=" + redirectURL
			                + "&MMplayerType=ActiveX"
			                + "&MMdoctitle=" + docTitle
							+ "&baseUrl=" + escape(dojoUrl);
			swflocEmbed += "?MMredirectURL=" + redirectURL 
							+ "&MMplayerType=PlugIn"
							+ "&baseUrl=" + escape(dojoUrl);
		}else{
		  // IE/Flash has an evil bug that shows up some time: if we load the
		  // Flash and it isn't in the cache, ExternalInterface works fine --
		  // however, the second time when its loaded from the cache a timing
		  // bug can keep ExternalInterface from working. The trick below 
		  // simply invalidates the Flash object in the cache all the time to
		  // keep it loading fresh. -- Brad Neuberg
		  swflocObject += "?cachebust=" + new Date().getTime();
		}

		if(swflocEmbed.indexOf("?") == -1){
			swflocEmbed +=  '?baseUrl='+escape(dojoUrl);
		}else{
		  swflocEmbed +=  '&baseUrl='+escape(dojoUrl);
		}

		objectHTML =
			'<object classid="clsid:d27cdb6e-ae6d-11cf-96b8-444553540000" '
			  + 'codebase="'
				+ this.protocol()
				+ '://fpdownload.macromedia.com/pub/shockwave/cabs/flash/'
				+ 'swflash.cab#version=8,0,0,0"\n '
			  + 'width="' + this.width + '"\n '
			  + 'height="' + this.height + '"\n '
			  + 'id="' + this.id + '"\n '
			  + 'name="' + this.id + '"\n '
			  + 'align="middle">\n '
			  + '<param name="allowScriptAccess" value="sameDomain"></param>\n '
			  + '<param name="movie" value="' + swflocObject + '"></param>\n '
			  + '<param name="quality" value="high"></param>\n '
			  + '<param name="bgcolor" value="#ffffff"></param>\n '
			  + '<embed src="' + swflocEmbed + '" '
			  	  + 'quality="high" '
				  + 'bgcolor="#ffffff" '
				  + 'width="' + this.width + '" '
				  + 'height="' + this.height + '" '
				  + 'id="' + this.id + 'Embed' + '" '
				  + 'name="' + this.id + '" '
				  + 'swLiveConnect="true" '
				  + 'align="middle" '
				  + 'allowScriptAccess="sameDomain" '
				  + 'type="application/x-shockwave-flash" '
				  + 'pluginspage="'
				  + this.protocol()
				  +'://www.macromedia.com/go/getflashplayer" '
				  + '></embed>\n'
			+ '</object>\n';
					
		// using same mechanism on all browsers now to write out
		// Flash object into page

		// document.write no longer works correctly
		// due to Eolas patent workaround in IE;
		// nothing happens (i.e. object doesn't
		// go into page if we use it)
		dojo.connect(dojo, "loaded", dojo.hitch(this, function(){
			var div = document.createElement("div");
			div.setAttribute("id", this.id + "Container");
			div.setAttribute("style", containerStyle);
			div.innerHTML = objectHTML;
	
			var body = document.getElementsByTagName("body");
			if(!body || !body.length){
				throw new Error("No body tag for this page");
			}
			body = body[0];
			body.appendChild(div);
		}));
	},  
	
	get: function(){ /* Object */
		// summary: Gets the Flash object DOM node.
		if(dojo.isIE || dojo.isSafari){
			return document.getElementById(this.id);
		}else{
			// different IDs on OBJECT and EMBED tags or
			// else Firefox will return wrong one and
			// communication won't work; 
			// also, document.getElementById() returns a
			// plugin but ExternalInterface calls don't
			// work on it so we have to use
			// document[id] instead
			return document[this.id + "Embed"];
		}
	},
	
	setVisible: function(/* Boolean */ visible){
	  //console.debug("setVisible, visible="+visible);
		
		// summary: Sets the visibility of this Flash object.		
		var container = dojo.byId(this.id + "Container");
		if(visible == true){
		  container.style.position = "absolute"; // IE -- Brad Neuberg
			container.style.visibility = "visible";
		}else{
			container.style.position = "absolute";
			container.style.x = "-1000px";
			container.style.y = "-1000px";
			container.style.visibility = "hidden";
		}
	},
	
	center: function(){
		// summary: Centers the flash applet on the page.
		
		var elementWidth = this.width;
		var elementHeight = this.height;

		var viewport = dijit.getViewport();

		// compute the centered position    
		var x = viewport.l + (viewport.w - elementWidth) / 2;
		var y = viewport.t + (viewport.h - elementHeight) / 2; 
		
		// set the centered position
		var container = dojo.byId(this.id + "Container");
		container.style.top = y + "px";
		container.style.left = x + "px";
	}
};


dojox.flash.Communicator = function(){
	// summary:
	//	A class that is used to communicate between Flash and JavaScript.
	// description:
	//	This class helps mediate Flash and JavaScript communication. Internally
	//	it uses Flash 8's ExternalInterface API, but adds functionality to fix 
	//	various encoding bugs that ExternalInterface has.
}

dojox.flash.Communicator.prototype = {
	// Registers the existence of a Flash method that we can call with
	// JavaScript, using Flash 8's ExternalInterface. 
	_addExternalInterfaceCallback: function(methodName){
		var wrapperCall = dojo.hitch(this, function(){
			// some browsers don't like us changing values in the 'arguments' array, so
			// make a fresh copy of it
			var methodArgs = new Array(arguments.length);
			for(var i = 0; i < arguments.length; i++){
				methodArgs[i] = this._encodeData(arguments[i]);
			}
			
			var results = this._execFlash(methodName, methodArgs);
			results = this._decodeData(results);
			
			return results;
		});
		
		this[methodName] = wrapperCall;
	},
	
	// Encodes our data to get around ExternalInterface bugs that are still
	// present even in Flash 9.
	_encodeData: function(data){
		if(!data || typeof data != "string"){
			return data;
		}
		
		// double encode all entity values, or they will be mis-decoded
		// by Flash when returned
		var entityRE = /\&([^;]*)\;/g;
		data = data.replace(entityRE, "&amp;$1;");

		// entity encode XML-ish characters, or Flash's broken XML serializer
		// breaks
		data = data.replace(/</g, "&lt;");
		data = data.replace(/>/g, "&gt;");

		// transforming \ into \\ doesn't work; just use a custom encoding
		data = data.replace("\\", "&custom_backslash;");

		data = data.replace(/\0/g, "\\0"); // null character
		data = data.replace(/\"/g, "&quot;");

		return data;
	},
	
	// Decodes our data to get around ExternalInterface bugs that are still
	// present even in Flash 9.
	_decodeData: function(data){
		// wierdly enough, Flash sometimes returns the result as an
		// 'object' that is actually an array, rather than as a String;
		// detect this by looking for a length property; for IE
		// we also make sure that we aren't dealing with a typeof string
		// since string objects have length property there
		if(data && data.length && typeof data != "string"){
			data = data[0];
		}
		
		if(!data || typeof data != "string"){
			return data;
		}
	
		// certain XMLish characters break Flash's wire serialization for
		// ExternalInterface; these are encoded on the 
		// DojoExternalInterface side into a custom encoding, rather than
		// the standard entity encoding, because otherwise we won't be able to
		// differentiate between our own encoding and any entity characters
		// that are being used in the string itself
		data = data.replace(/\&custom_lt\;/g, "<");
		data = data.replace(/\&custom_gt\;/g, ">");
		data = data.replace(/\&custom_backslash\;/g, '\\');
		
		// needed for IE; \0 is the NULL character
		data = data.replace(/\\0/g, "\0");
		
		return data;
	},
	
	// Executes a Flash method; called from the JavaScript wrapper proxy we
	// create on dojox.flash.comm.
	_execFlash: function(methodName, methodArgs){
		var plugin = dojox.flash.obj.get();
		methodArgs = (methodArgs) ? methodArgs : [];
		
		// encode arguments that are strings
		for(var i = 0; i < methodArgs; i++){
			if(typeof methodArgs[i] == "string"){
				methodArgs[i] = this._encodeData(methodArgs[i]);
			}
		}

		// we use this gnarly hack below instead of 
		// plugin[methodName] for two reasons:
		// 1) plugin[methodName] has no call() method, which
		// means we can't pass in multiple arguments dynamically
		// to a Flash method -- we can only have one
		// 2) On IE plugin[methodName] returns undefined -- 
		// plugin[methodName] used to work on IE when we
		// used document.write but doesn't now that
		// we use dynamic DOM insertion of the Flash object
		// -- Brad Neuberg
		var flashExec = function(){ 
			return eval(plugin.CallFunction(
						 "<invoke name=\"" + methodName
						+ "\" returntype=\"javascript\">" 
						+ __flash__argumentsToXML(methodArgs, 0) 
						+ "</invoke>")); 
		};
		var results = flashExec.call(methodArgs);
		
		if(typeof results == "string"){
			results = this._decodeData(results);
		}
			
		return results;
	}
}

// FIXME: dojo.declare()-ify this

// TODO: I did not test the Install code when I refactored Dojo Flash from 0.4 to 
// 1.0, so am not sure if it works. If Flash is not present I now prefer 
// that Gears is installed instead of Flash because GearsStorageProvider is
// much easier to work with than Flash's hacky ExternalInteface. 
// -- Brad Neuberg
dojox.flash.Install = function(){
	// summary: Helps install Flash plugin if needed.
	// description:
	//		Figures out the best way to automatically install the Flash plugin
	//		for this browser and platform. Also determines if installation or
	//		revving of the current plugin is needed on this platform.
}

dojox.flash.Install.prototype = {
	needed: function(){ /* Boolean */
		// summary:
		//		Determines if installation or revving of the current plugin is
		//		needed. 
	
		// do we even have flash?
		if(dojox.flash.info.capable == false){
			return true;
		}

		// Must have ExternalInterface which came in Flash 8
		if(!dojox.flash.info.isVersionOrAbove(8, 0, 0)){
			return true;
		}

		// otherwise we don't need installation
		return false;
	},

	install: function(){
		// summary: Performs installation or revving of the Flash plugin.
	
		// indicate that we are installing
		dojox.flash.info.installing = true;
		dojox.flash.installing();
		
		if(dojox.flash.info.capable == false){ // we have no Flash at all
			// write out a simple Flash object to force the browser to prompt
			// the user to install things
			var installObj = new dojox.flash.Embed(false);
			installObj.write(); // write out HTML for Flash
		}else if(dojox.flash.info.isVersionOrAbove(6, 0, 65)){ // Express Install
			var installObj = new dojox.flash.Embed(false);
			installObj.write(true); // write out HTML for Flash 8 version+
			installObj.setVisible(true);
			installObj.center();
		}else{ // older Flash install than version 6r65
			alert("This content requires a more recent version of the Macromedia "
						+" Flash Player.");
			window.location.href = + dojox.flash.Embed.protocol() +
						"://www.macromedia.com/go/getflashplayer";
		}
	},
	
	// Called when the Express Install is either finished, failed, or was
	// rejected by the user.
	_onInstallStatus: function(msg){
		if (msg == "Download.Complete"){
			// Installation is complete.
			dojox.flash._initialize();
		}else if(msg == "Download.Cancelled"){
			alert("This content requires a more recent version of the Macromedia "
						+" Flash Player.");
			window.location.href = dojox.flash.Embed.protocol() +
						"://www.macromedia.com/go/getflashplayer";
		}else if (msg == "Download.Failed"){
			// The end user failed to download the installer due to a network failure
			alert("There was an error downloading the Flash Player update. "
						+ "Please try again later, or visit macromedia.com to download "
						+ "the latest version of the Flash plugin.");
		}	
	}
}

// find out if Flash is installed
dojox.flash.info = new dojox.flash.Info();

// vim:ts=4:noet:tw=0:

}