[jQuery] Survey Check fails in Internet Explorer

Hello everybody,

Ok so i am a complete beginner in both jQuery, JavaScript and english.
I build a script to check a survey for empty questions, if so show a
new tr and make a list of empty questions. If the script detects no
errors it will submit the form.

It worked like a charm in firefox but on no other browser it seemed to
work.

function checkSurvey(){
$(".error").removeClass("error");
$("#error").addClass("error");
errormsg = '';
error = false;
$(".question").each(function(){
if ( $(this).find('input:checked').length>0){
i = this.id.substr(2);
errormsg += '<a href="#'+this.id+'">Fout bij vraag '+i+'</a><br /
>';
error = true;
$(this).addClass("error");
}
});
if(errormsg!=''){
$("#error").show();
$("#error td div")[0].innerHTML = errormsg;
}
else{
$("#survey")[0].submit();
}
}

...

Help!