how can i get which button click in yes no alert message box

Question

hii

 

i create a alert message box using javascript here is the code:------------

 

function yesno() {

var confirm_value = document.createElement("INPUT");

confirm_value.type = "hidden";

confirm_value.name = "confirm_value";

$("#dialog1").dialog({

resizable: false,

buttons: {

Yes: function () {

$("[id*=btn1]").click({

});

$(this).dialog('close');

},

No: function () {

$(this).dialog('close');

}

}

});

document.forms[0].appendChild(confirm_value);

}

 

but i want if i click yes button some server side operation will be performed.so how can i get which button is clicked in my aspx.cs file.so that i will able to do some operation