Capital To First letter With Jquery

function toUpper(obj) {
    var mystring = obj.value;

    var sp = mystring.split(‘ ‘);
    var wl = 0;
    var f, r;
    var word = new Array();
    for (i = 0 ; i < sp.length ; i++) {
        f = sp[i].substring(0, 1).toUpperCase();
        r = sp[i].substring(1).toLowerCase();
        word[i] = f + r;
    }
    newstring = word.join(‘ ‘);
    obj.value = newstring;
    return true;
}