i create a cookie and use it like this.inside a `document.ready`  

```
 document.cookie = $('#rdb1').attr("id");
 check = document.cookie.split(';');
 flag = check[0];

```

But unable to erase cookies.I found this function.  

```
function Delete_Cookie( name, path, domain ) 
{
   if ( Get_Cookie( name ) )
   document.cookie=name+"="+((path) ? ";path="+path:"")+((domain)?";domain="+domain:"") +
                                   ";expires=Thu, 01-Jan-1970 00:00:01 GMT";
}

```

on [javascript - delete cookie](https://stackoverflow.com/questions/2144386/javascript-delete-cookie).But unable to use this function in my situation.Any idea how to deal with this.Thanks.