I have a button 

```
<script>
function changeMap() {
 container.setMap(oMap); 
}   
</script>
<button onClick="changeMap"> Click here </button>

```

The content of container is correct. it has a control.
The set Map property exists from what i see in the console.

When the page loads all is correct. but when i click the button the property doesn't set OR the content of the page doesn't change.

Do i need to load some other way? Thank you in advance :)