$("#dialog-DOB").dialog({
autoOpen: false,
resizable: false,
height: 'auto',
width: '400px',
modal: true,
show: { effect: "drop", direction: "down" },
hide: { effect: "drop", direction: "up" },
buttons: {
"Okay": function () {
$("#<%=txtDate.ClientID %>").value = "";
$(this).dialog("close");
}
}