/*
Title: Flash Detection JavaScript

Date Created: 10/4/2006

Purpose: This JS file provides a simple and reliable means of testing end user flash version prior to loading a flash viewer on your site.

Usage: Reference this js file like so in the head tag of your html page:
<script type="text/javascript" language="JavaScript" src="flashDetect.js" ></script>

Then call the isFlashCurrent function using these parameters:
isFlashCurrent(6, 0, 65)

Since the method returns true if the minimum flash version is found the best way to use the function is in a if loop referencing
what you would like to do (redirect to Macromedia's website, go to another page, etc) if the function returns false.  If you redirect
to another page after the script block with the isFlashCurrent function call you can pass the code that embeds the viewer since the 
redirect will act as a return causing users without the right version of flash to be taken to another page and their browser will not load
the rest of the page where the viewers are initialized

For an example reference:
http://s7isorigin-qa.scene7.com/Flash_Check/Example.html

Notes:  This method will fail on Flash versions < 6.0.65 however this version is not supported by the viewers so this hsould not be a problem
*/



var isIE = (navigator.appVersion.indexOf("MSIE") != -1) ? true : false;
var isWin = (navigator.appVersion.toLowerCase().indexOf("win") != -1) ? true : false;
var isOpera = (navigator.userAgent.indexOf("Opera") != -1) ? true : false;
var flashDescription;

//
// This will likely fail on versions before flash 6, but since we don't 
// support versions before 6.0r65 it is ok.
//
function isFlashCurrent(versionMajorReq, versionMinorReq, versionRevisionReq) {
    var versionMajor;
    var versionMinor;
    var versionRevision;

    // NS/Opera version >= 3 check for Flash plugin in plugin array
    if (navigator.plugins != null && navigator.plugins.length > 0) {
        if (navigator.plugins["Shockwave Flash"]) {
            // parse the description to get the version
            flashDescription = navigator.plugins["Shockwave Flash"].description;
            var descArray = flashDescription.split(" ");
            var tempArrayMajor = descArray[2].split(".");
            versionMajor = tempArrayMajor[0];
            versionMinor = tempArrayMajor[1];
            if (descArray[3] != "") {
                tempArrayMinor = descArray[3].split("r");
            } else {
                tempArrayMinor = descArray[4].split("r");
            }
            versionRevision = tempArrayMinor[1] > 0 ? tempArrayMinor[1] : 0;

        }
    } else if (isIE && isWin && !isOpera) {
        try {
            var axo = new ActiveXObject("ShockwaveFlash.ShockwaveFlash." + versionMajorReq);

            // GetVariable("$version") crashes for versions 6.0.22 through 6.0.29,
            // so be careful.  Of course we don't run those versions.
            axo.AllowScriptAccess = "always";
            // required for v6.x?
            var version = axo.GetVariable("$version");
            // safe to call for 6.0r47 or greater
            flashDescription = version;

            // parse the version data
            tempArray = version.split(" ");
            // ["WIN", "2,0,0,11"]
            tempString = tempArray[1];
            // "2,0,0,11"
            versionArray = tempString.split(",");
            // ['2', '0', '0', '11']

            versionMajor = versionArray[0];
            versionMinor = versionArray[1];
            versionRevision = versionArray[2];
            // should be 3???
        } catch (e) {
        }
    }

    // test version
    if (versionMajor > versionMajorReq) {
	// alerts are just for demonstration and testing, disable when in production
    	//alert("Flash Version: " + versionMajor + "," + versionMinor + "," + versionRevision + " detected");
        return true;
    }
    if (versionMajor == versionMajorReq
            && versionMinor > versionMinorReq) {
	// alerts are just for demonstration and testing, disable when in production
        //alert("Flash Version: " + versionMajor + "," + versionMinor + "," + versionRevision + " detected");
       	return true;
    }
    if (versionMajor == versionMajorReq
            && versionMinor == versionMinorReq
            && versionRevision >= versionRevisionReq) {
	// alerts are just for demonstration and testing, disable when in production
	//alert("Flash Version: " + versionMajor + "," + versionMinor + "," + versionRevision + " detected");
        return true;
    }

    // alerts are just for demonstration and testing, disable when in production
    //alert("Flash Version: " + versionMajor + "," + versionMinor + "," + versionRevision + " detected");
    return false;
}