var backgroundState = 0;
visibility = "";

//videowindow expand trigger
function expandTrigger(sender) {
if (backgroundState == 0) {
backgroundState = 1;
sender.findName("videowindowExpand").begin();
sender.findName("plasma").visibility = "Visible";
visibility = "Collapsed";
collapseThumbs(sender);
} else {
backgroundState = 0;
sender.findName("videowindowShrink").begin();
sender.findName("plasma").visibility = "Collapsed";
visibility = "Visible";
uncollapseThumbs(sender);
}

//Collapse or Visible routine
//sender.findName("screen").visibility = visibility;
sender.findName("theForeground").visibility = visibility;
sender.findName("videoframe2").visibility = visibility;
sender.findName("blackbox").visibility = visibility;

}