function showMenu(whichMenu) {
	menuP.setVisible(0);
	menuT.setVisible(0);
	menuF.setVisible(0);
	menuA.setVisible(0);
	whichMenu.setVisible(1);
}


function wpop(page, name, w, h, c) {
    xposition=0; yposition=0;
	
    if ((parseInt(navigator.appVersion) >= 4 ) && (c)){
        xposition = (screen.width - w) / 2;
        yposition = (screen.height - h) / 2;
    }

   if (document.sidebar) { h = h - 10; }

    args = "width=" + w + "," 
    + "height=" + h + "," 
    + "location=0," 
    + "menubar=0,"
//    + "resizable=0,"
    + "scrollbars=yes,"
    + "status=0," 
    + "titlebar=0,"
    + "toolbar=0,"
    + "hotkeys=0,"
    + "screenx=" + xposition + "," 
    + "screeny=" + yposition + ","  
    + "left=" + xposition + ","     
    + "top=" + yposition; 
	
	newwin = window.open( page,name,args );
	newwin.focus();
}