{wx = 340;wy = 460;
x = (screen.width - wx)/2;
y = (screen.height - wy)/2;}

function teacher(){
var window_location;
window_location=window.open("bbs/teacher_bbs.html","blank","Toolbar=0,Menubar=0,Scrollbars=1,Resizable=0,Close=1,width=400,height=500");
window_location.window.moveTo(10,10);}

function particular(){
var window_location;
window_location=window.open("bbs/particular.html","blank","Toolbar=0,Menubar=0,Scrollbars=1,Resizable=0,Close=1,width=460,height=500");
window_location.window.moveTo(10,10);}