/documentation/af.ui/$.ui.blockUI.md

#$.ui.blockUI(opacity)

```

This will throw up a mask and block the UI
         
```

##Example

```
         $.ui.blockUI(.9)
         
```
`

##Parameters

```
opacity                       Float

```

##Returns

```
undefined
```

##Detail

$.ui.blockUI is a shortcut to $.blockUI from the popup plugin.

This function throws up a mask on the screen and is used with plugins like the popup plugin.

```
$.ui.blockUI(0.9)
```


Let's try it below.  We will hide it after 3 seconds.

<script>
function blockUI(){
    $.ui.blockUI(0.3);

    setTimeout(function(){
        $.ui.unblockUI()
    },3000);
}
</script>


<input type="button" value="Block UI" onclick="blockUI()">