window.setInterval(function()
{
foo (id);
}, 1000);

function foo(id)
{
alert(id);
}
function _foo(id)
{
return function()
{
foo(id);
}
}
window.setInterval(_foo(id),1000);

function foo(id)
{
alert(id);
}
var _sto = setInterval;
window.setInterval = function(callback,timeout,param)
{
var args = Array.prototype.slice.call(arguments,2);
var _cb = function()
{
callback.apply(null,args);
}
_sto(_cb,timeout);
}
window.setInterval(hello,3000,userName);