Childbrowser terminates - objective-c

Question

Calling multiple function in a javascript to get Username/Emailaddress/Password. When everything is fine go to goForLogin() and open a chrildbrowser. I get en error (See below):
First my code:
function goForLogin(emailaddress, value){
var xmlhttp;
xmlhttp=new XMLHttpRequest();
xmlhttp.open("POST","http://dev.server.com/test/login",true);
xmlhttp.setRequestHeader("Content-type","application/x-www-form-urlencoded");
xmlhttp.send("email=" + emailaddress + "&password=" + value);
xmlhttp.onreadystatechange=function()
{
if (xmlhttp.status==200)
{
value = null;
window.plugins.childBrowser.showWebPage('http://dev.server.com');
} else {
alert("FAILED");
}
}
}
* Terminating app due to uncaught exception 'NSInvalidArgumentException', reason: 'Application tried to present
modally an active controller .'
* First throw call stack: (0x154012 0x25fce7e 0x478721 0x479777 0x4797b7 0x6a68 0x67471 0x66c5e 0x67039 0x26106b0 0x1198035 0xd7f3f
0xd796f 0xfa734 0xf9f44 0xf9e1b 0x33be7e3 0x33be668 0x38f65c 0x2366
0x2295) libc++abi.dylib: terminate called throwing an exception (lldb)
Newest Cordova and Childbrowser, Xcode 4.4 versions.

Answer 1

I got it! Because of the xmlhttp.onreadystatechange statement the childBrowser is going to be open three times in this script. It is not allowed by apple - sorry, I forgot why - so I did a call back. It looks like this:
My JavaScript:
function some_function2(url, callback) {
var httpRequest; // create our XMLHttpRequest object
if (window.XMLHttpRequest) {
httpRequest = new XMLHttpRequest();
} else if (window.ActiveXObject) {
// Internet Explorer is stupid
httpRequest = new
ActiveXObject("Microsoft.XMLHTTP");
}
httpRequest.onreadystatechange = function() {
// inline function to check the status
// of our request
// this is called on every state change
if (httpRequest.readyState === 4 &&
httpRequest.status === 200) {
callback.call(httpRequest.responseXML);
// call the callback function
}
};
httpRequest.open('POST', url, true);
httpRequest.setRequestHeader("Content-type","application/x-www-form-urlencoded");
httpRequest.send("email=test#test.com&password=1");
}
function call() {
// call the function
some_function2("http://dev.server.com/account/login/", function() {
console.log(this);
callChildBrowser();
});
console.log("this will run before the above callback");
}
function callChildBrowser(){
window.plugins.childBrowser.showWebPage('http://dev.server.com');
}
Finally in my html:
<button id="butten" onclick="call()">WORKS</button>