Django与Ajax

Question

I want send to ajax username of current user, so :

<a href="#" onclick="return goto_confirm({{ user.username }})" ><b>Eat</b></a>

My function js :

function goto_confirm(theusername){
    alert("Hello "+theusername.value);
    var eating;
    if(confirm("Are-you sure ?"))
        eating = true;
    else
        eating = false;

    return false;
}

But on click, I have this error : ReferenceError: toto938 is not defined

"toto938" is the value of user.username...