var win = null;

function NewWindow(mypage,myname,w,h,scroll){

LeftPosition = (screen.width) ? (screen.width-w)/2 : 0;

TopPosition = (screen.height) ? (screen.height-h)/2 : 0;

settings = 'height='+h+',width='+w+',top='+TopPosition+',left='+LeftPosition+',scrollbars='+scroll+',resizable';

win = window.open(mypage,myname,settings);

win.focus();

}