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function resizeIframe() {
var btb = document.getElementById('btb');
btb.style.height = btb.contentWindow.document. body.scrollHeight + "px";
}

function redirectToStatic() {
var target="https://newint.org/static/btb/btb.html";
setTimeout(function() {window.location.href=target}, 5000);
}

function mobileRedirect() {
// Safari 3.0+ "[object HTMLElementConstructor]"
var isSafari = /constructor/i.test(window.HTMLElement) || (function (p) { return p.toString() === "[object SafariRemoteNotification]"; })(!window['safari'] || (typeof safari !== 'undefined' && safari.pushNotification));
var isIOS = /iPad|iPhone|iPod/.test(navigator.userAgent) && !window.MSStream;
var isMobile = window.screen.width < 500 || window.screen.height <500;
if (isIOS) {
insertCss("#frame-wrapper {overflow: auto; -webkit-overflow-scrolling: touch;}");
document.getElementById('mobile-msg').style.display='block';
redirectToStatic();
}
}

//https://stackoverflow.com/questions/707565/how-do-you-add-css-with-javas...
function insertCss( code ) {
var style = document.createElement('style');
style.type = 'text/css';
if (style.styleSheet) {
// IE
style.styleSheet.cssText = code;
}
else {
// Other browsers
style.innerHTML = code;
}
document.getElementsByTagName("head")[0].appendChild( style );
}

mobileRedirect();