The button on a page has the following code:

```
<a onclick="return ValidateAll();" id="btnSignin" tabindex="5" href='javascript:WebForm_DoPostBackWithOptions(new WebForm_PostBackOptions("btnSignin", "", true, "Login", "", false, true))'>Sign In

```

my code: `ie.button(:id,"btnSignin").click` does not throw any error yet does not click the button

How to make the button click?