простейший пример get (set) variable

[dimarik]

<HTML>
<HEAD>
<TITLE>:: Send vars exapmle ::</TITLE>
<script language=JavaScript>
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var d=document;
// Handle all the FSCommand messages in a Flash movie
function control_DoFSCommand(command, args) {
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	if (command == "key") {
		controlObj.focus();
// То, что Вас интересовало
		controlObj.SetVariable("sessionKey","1234567");
	}
}
// Hook for Internet Explorer
if (navigator.appName && navigator.appName.indexOf("Microsoft") != -1 && 
	  navigator.userAgent.indexOf("Windows") != -1 && navigator.userAgent.indexOf("Windows 3.1") == -1) {
	document.write('<SCRIPT LANGUAGE=VBScript\> \n');
	document.write('on error resume next \n');
	document.write('Sub control_FSCommand(ByVal command, ByVal args)\n');
	document.write('  call control_DoFSCommand(command, args)\n');
	document.write('end sub\n');
	document.write("</SCRIPT\> \n");
}
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	control.movie = "/loaderExample.swf?rnd=" + Math.floor(Math.random()*1000000);
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</HEAD>
<BODY onLoad="initialize();">
	<!-- Flash 7 ActiveX Object-->
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</table>
</BODY>
</HTML>