function userdet() {
window.onerror=null;

document.fbform.platform.value = navigator.platform;
document.fbform.width.value = window.screen.width;
document.fbform.height.value = window.screen.height;
document.fbform.colordepth.value = window.screen.colorDepth;
document.fbform.navigator.value = navigator.appName;
document.fbform.codename.value = navigator.appCodeName;
document.fbform.version.value = navigator.appVersion;
if (navigator.javaEnabled() < 1) document.fbform.java.value="No";
if (navigator.javaEnabled() == 1) document.fbform.java.value="Yes";

}