as3 autoclose paypal webview on purchase

[AS3.0]

Hi, in this script I made its very useful, you simply put your paypal payment page url on line 4 & you fill in the details and when you submit your payment the code helps autoskip the "would you like to sign up" popup and than it makes the webview page disappear when you get to the "purchase finished" page.

var webView:StageWebView = new StageWebView();
webView.stage = this.stage;
webView.viewPort = new Rectangle( 0, 0, 480, 720);
webView.loadURL("");//paypal purchase page

webView.addEventListener(Event.COMPLETE,handleLoad);
var wvjs_timeout;
function handleLoad(e:Event){
wvjs_timeout=setTimeout(webViewLoop,1000);
}

function webViewLoop(){
webView.loadURL("javascript:if(document.getElementById('notNow')!=null){document.getElementById('notNow').click();};if(document.getElementById('cancel')!=null){document.getElementById('cancel').click();location.href='?as3Stream=auto_close';}");
wvjs_timeout=setTimeout(webViewLoop,1000);
}
webView.addEventListener(LocationChangeEvent.LOCATION_CHANGING,hrefNew);
function hrefNew(e:LocationChangeEvent){
if(e.location.split("?")[e.location.split("?").length-1].split("=")[1]=="auto_close"){
clearTimeout(wvjs_timeout);
webView.viewPort = null;
webView.stage = null;
webView.dispose();
}
}