var javascriptVersion1_1 = false;
var detectableWithVB = false;
var pluginFound = false;


function goURL(daURL) {
	/* if the browser can do it, use replace to preserve back button */
    if(javascriptVersion1_1) {
	window.location.replace(daURL);
    } else {
	window.location = daURL;
    }
    return;
}

function redirectCheck(pluginFound, redirectURL, redirectIfFound) {
	/* check for redirection */
    if( redirectURL && ((pluginFound && redirectIfFound) || 
	(!pluginFound && !redirectIfFound)) ) {
	/* go away */
	goURL(redirectURL);
	return pluginFound;
    } else {
	/* stay here and return result of plugin detection */
	return pluginFound;
    }	
}

function canDetectPlugins() {
    if( detectableWithVB || (navigator.plugins && navigator.plugins.length > 0) ) {
	return true;
    } else {
	return false;
    }
}



function detectReal(redirectURL, redirectIfFound) {
    pluginFound = detectPlugin('RealPlayer');
 	/* if not found, try to detect with VisualBasic */
    if(!pluginFound && detectableWithVB) {
	pluginFound = (detectActiveXControl('rmocx.RealPlayer G2 Control') ||
		       detectActiveXControl('RealPlayer.RealPlayer(tm) ActiveX Control (32-bit)') ||
				 detectActiveXControl('rmocx.RealPlayer G2 Control.1') ||
		       detectActiveXControl('RealVideo.RealVideo(tm) ActiveX Control (32-bit)'));
    }	
    return redirectCheck(pluginFound, redirectURL, redirectIfFound);
}


function detectPlugin() {
    /* allow for multiple checks in a single pass */
    var daPlugins = detectPlugin.arguments;
   	/* consider pluginFound to be false until proven true */
    var pluginFound = false;
  	 /* if plugins array is there and not fake */
    if (navigator.plugins && navigator.plugins.length > 0) {
	var pluginsArrayLength = navigator.plugins.length;
	/* for each plugin... */
	for (pluginsArrayCounter=0; pluginsArrayCounter < pluginsArrayLength; pluginsArrayCounter++ ) {
	  	/* loop through all desired names and check each against the current plugin name */
	    var numFound = 0;
	    for(namesCounter=0; namesCounter < daPlugins.length; namesCounter++) {
	    /* if desired plugin name is found in either plugin name or description */
		if( (navigator.plugins[pluginsArrayCounter].name.indexOf(daPlugins[namesCounter]) >= 0) || 
		    (navigator.plugins[pluginsArrayCounter].description.indexOf(daPlugins[namesCounter]) >= 0) ) {
		   
		    numFound++;
		}   
	    }
	    /* now that we have checked all the required names against this one plugin, */
	    /* if the number we found matches the total number provided then we were successful */
	    if(numFound == daPlugins.length) {
		pluginFound = true;
		/* if we've found the plugin, we can stop looking through at the rest of the plugins */
		break;
	    }
	}
    }
    return pluginFound;
}/* detectPlugin */

/* Here we write out the VBScript block for MSIE Windows */
 
if ((navigator.userAgent.indexOf('MSIE') != -1) && (navigator.userAgent.indexOf('Win') != -1)) {
    document.writeln('<script language="VBscript">');

    document.writeln('\'do a one-time test for a version of VBScript that can handle this code');
    document.writeln('detectableWithVB = False');
    document.writeln('If ScriptEngineMajorVersion >= 2 then');
    document.writeln('  detectableWithVB = True');
    document.writeln('End If');

    document.writeln('\'this next function will detect most plugins');
    document.writeln('Function detectActiveXControl(activeXControlName)');
    document.writeln('  on error resume next');
    document.writeln('  detectActiveXControl = False');
    document.writeln('  If detectableWithVB Then');
    document.writeln('     detectActiveXControl = IsObject(CreateObject(activeXControlName))');
    document.writeln('  End If');
    document.writeln('End Function');

    

    document.writeln('</scr' + 'ipt>');
}