[jQuery] Passing parameters to $.post

[jQuery] Passing parameters to $.post

I've given the good ol' college try and haven't landed the bird yet.  I want to pass parameters to $.post using a string but I keep getting "missing : after property id" in Firebug.. How can I dynamicly pass parameters?  I need to dynamicly pass params and act on the returned array.
Code:
function postReturnData(url) {
    var params = 'name:"John",id:"Pringle"';
    $.post(url,{params },function(txt) {
        alert("Return data from bind2.php: "+txt);
    }    );
}
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