Function.prototype.binding = function() {
    if (arguments.length < 2 && typeof arguments[0] == "undefined") return this;
    var __method = this, args = jQuery.makeArray(arguments), object = args.shift();
    return function() {
        return __method.apply(object, args.concat(jQuery.makeArray(arguments)));
    }
}

function a(obj) { 
    $("#id").bind("click", function(obj) {
        alert(obj);
    }.binding(this, obj)); 
}