使javascript警报是/否而不是确定/取消

function btnSelete_Click() {
    var strconfirm = confirm("Are you sure you want to delete?");
    if (strconfirm == true) {
        return true;
    }
}

<asp:Button ID="btnSelect" runat="server" Text="Select" Onclientclick="return btnSelete_Click();" CssClass="cssbutton" />
function btnSelete_Click() {
    var strconfirm