// JavaScript Document

wx=300; wy=300;
x=(screen.width - wx)/2;
y=(screen.height - wy)/2;

function openWin1() {window.open("dutch_music.html","","left="+x+",top="+y+",width="+wx+",height="+wy);}
function openWin2() {window.open("jeannette_koekkoek.html","","left="+x+",top="+y+",width="+wx+",height="+wy);}
function openWin3() {window.open("het_nede_pian.html","","left="+x+",top="+y+",width="+wx+",height="+wy);}
function openWin4() {window.open("the_sagee_piano_trio.html","","left="+x+",top="+y+",width="+wx+",height="+wy);}