// Name: Flash Detection
// Language: JavaScript/VBScript
// Author: Travis Beckham | squidfingers.com
// Description: Detect if the Flash plug-in is installed and either handle redirection or write Flash content.
// --------------------------------------------------

var Flash = new Object();

/*
-----------------------------------------------------
Argument Description for "Flash.hasVersion"

1. requiredVersion (number): The minimum Flash version required.

-----------------------------------------------------
Possible Return Values for "Flash.hasVersion"

true: has the correct Flash version or greater
false: does not have the correct Flash version
null: the browsers plug-ins cannot be checked

-----------------------------------------------------
*/

Flash.hasVersion = function (requiredVersion){
	requiredVersion = parseInt(requiredVersion);
	if(navigator.plugins != null && navigator.plugins.length > 0){
		var version = 0;
		var plugin = navigator.plugins["Shockwave Flash"];
		if(typeof plugin == "object"){
			var description = plugin.description;
			var version=description.substr(0, description.indexOf("."));
			version = parseInt(version.substr(version.lastIndexOf(" ")));
		}
		return (version >= requiredVersion) ? true : false;
	}else if(navigator.appVersion.indexOf("Mac") == -1 && window.execScript){
		Flash.hasVersion_result = false; // MUST be a global variable for execScript.
		for(var i = requiredVersion; i <= requiredVersion+5 && Flash.hasVersion_result != true; i++){
			execScript('on error resume next: Flash.hasVersion_result=IsObject(CreateObject("ShockwaveFlash.ShockwaveFlash.'+i+'"))','VBScript');
		}
		return Flash.hasVersion_result;
	}
	return null;
}

/*
-----------------------------------------------------
Argument Description for "Flash.redirect"

1. requiredVersion (number): The minimum Flash version required.
2. noFlashPage (string): The URL of the "no Flash page".

Notes:
This method redirects to the "no Flash page" if the user's browser cannot be 
checked for the Flash plug-in (MacIE 4.5). To assume these browsers have Flash, 
simply check if the return value of "this.hasVersion" equals false.
Example: if(this.hasVersion(requiredVersion) == false)...

-----------------------------------------------------
*/
Flash.redirect = function (requiredVersion, noFlashPage){
	if(document.referrer.indexOf(noFlashPage) != -1) return;
	if(!this.hasVersion(requiredVersion)) window.location.href = noFlashPage;
}

/*
-----------------------------------------------------
Argument Description for "Flash.write"

1. name (string): The movie name.
2. version (string): The version of the Flash movie.
3. width (string): The width of the movie.
4. height (string): The height of the movie.
7. showMenu (boolean) optional: Show the menu when control clicking the Flash movie
8. varsObj (object) optional: Query string variables to pass into Flash.

-----------------------------------------------------
*/

Flash.write = function (url, version, id, width, height, showMenu, varsObj){
	var fvars = vars = "";
	if(varsObj){
		for (var i in varsObj) fvars += i + "=" + escape(varsObj[i]) + "&";
		vars = "?"+fvars;
	}
	var swf = '<object type="application/x-shockwave-flash"';
	//swf += ' classid="clsid:D27CDB6E-AE6D-11cf-96B8-444553540000"';
	swf += 'data="'+url+'"';
	swf += ' width="'+width+'"';
	swf += ' height="'+height+'"';
	if(id) swf += ' id="'+id+'"';
	swf += ' align="middle"';
	swf += ' codebase="http://download.macromedia.com/pub/shockwave/cabs/flash/swflash.cab#version='+version+',0,0,0">';
	swf += '<param name="movie" value="'+url+vars+'">';
	if(varsObj) swf += '<param name="FlashVars" value="'+fvars+'">'
	if(!showMenu) swf += '<param name="menu" value="false">';
	/*
	swf += '<embed src="'+url+vars+'"';
	swf += ' width="'+width+'"';
	swf += ' height="'+height+'"';
	if(id) swf += ' name="'+id+'" id="swf_'+id+'"';
	if(varsObj) swf += ' FlashVars="'+fvars+'"';
	if(!showMenu) swf += ' menu="false"';
	swf += ' type="application/x-shockwave-flash"';
	swf += ' pluginspage="http://www.macromedia.com/shockwave/download/index.cgi?P1_Prod_Version=ShockwaveFlash">';
	swf += '<\/embed>';
	*/
	swf += '<\/object>';
	document.write(swf);
}