var InternetExplorer = navigator.appName.indexOf("Microsoft") != -1;

function mapcontrols_DoFSCommand(command, track, duration, name) { 
var map = InternetExplorer ? parent.mapcontrols : parent.document.mapcontrols; 

if ( command=='home' ) {
map.SetVariable("/:track", track);
map.SetVariable("/:durTime", duration);
map.SetVariable("/:songName", name);
map.GotoFrame(1);
map.Play();
} 

}