Build a calculator

My code looks like this, works fine, but when I try do go to next lesson it says that I need to try again. What is the problem?
(document).ready(function(){ var testNumLength = function(number) { if (number.length > 9) { totaldiv.text(number.substr(number.length-9,9)); if (number.length > 15) { number = ""; totaldiv.text("Err"); } } }; var number = ""; var newnumber = ""; var operator = ""; var totaldiv = ("#total");
totaldiv.text(“0”);

//Add your .click() here!
$("#numbers a").not("#clear,#clearall").click(function(){
    number += $(this).text();
    totaldiv.text(number);
    testNumLength(number);    
    });

});

Had the same problem.
I left testNumLength(); without the number in it and worked.

Edit 1: Okay, so it got changed to testNumLength(number); after I started next part.