You should use a script to open a new window, like this:
fucntion newWindow() {
w = screen.availWidth;
h = screen.availHeight;
newWin = window.open('somepage.asp','','width=' + w + ',height=' + h);
}
Or use this script to resize the page after it is opened:
function fullWindow() {
if (window.screen) {
w = screen.availWidth;
h = screen.availHeight;
window.moveTo(0, 0);
window.resizeTo(w, h);
}
}
Activate it on onLoad event:
<body onLoad="fullWindow()">