function show(tgt){
if(!window.current==false){
kill();
hide(window.current);
}
window.current = tgt;
document.getElementById(tgt).style.visibility='visible'
}
function hide(tgt){
document.getElementById(tgt).style.visibility='hidden'
}
function wait(tgt, time){
if(!time){var time = 2000;}
window.quit = window.setTimeout('hide(\''+tgt+'\')',time);  //hide(document.getElementById(tgt))
}
function kill(){
if(quit)clearTimeout(quit);
}