function hide(x) {
    if (document.layers) {
        document.layers[x].display = 'none';
    } else if (document.all) {
        document.all[x].style.display = 'none';
    } else if (document.getElementById) {
        document.getElementById(x).style.display = 'none';
    }
}

function show(x) {
    if (document.layers) {
        document.layers[x].display = 'block';
    } else if (document.all) {
        document.all[x].style.display = 'block';
    } else if (document.getElementById) {
        document.getElementById(x).style.display = 'block';
    }
}
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)
}