function popupcenter(url,width,height,features)
{
var top=(screen.height-height)/2;
var left=(screen.width-width)/2;
window.open(url,"","top="+top+",left="+left+",width="+width+",height="+height+","+features);
}

function makevisible(cur,which){
if (which==0) cur.filters.alpha.opacity=50
else cur.filters.alpha.opacity=100 }