window.onload=MaxWin();

function MaxWin(){
    var offset=(navigator.appName=="Microsoft Internet Explorer" && navigator.userAgent.indexOf("Mac")==-1)?4:0;
    var width=screen.availWidth+2*offset;
    var height=screen.availHeight+2*offset;
     
    window.moveTo(-offset,-offset);
    window.resizeTo(width,height);
}