CRM 2011 Validate required form using javascript

This code checks if form is valid for saving, by going over all required attributes and checking if it contains value.

function IsFormValidForSaving(){

var valid = true;
    Xrm.Page.data.entity.attributes.forEach(function (attribute, index) {
        if (attribute.getRequiredLevel() == "required") {
            if (attribute.getValue() == null) {
                if (valid) {
                    var control = attribute.controls.get(0);
                    alert(control.getLabel() + " Field is empty");
                    control.setFocus();
                }
                valid = false;
            }
        }
    });
    return valid;

}

http://dynamicslollipops.blogspot.com/2012/07/microsoft-dynamics-crm-2011-validate.html