Question: I have such code:

```
<div style="width:500; height:500;">
    <input type="button"/>
</div>

```

how to fit the button to the div's sizes?
if its imposible ny css, i can use js,jquery

Answer: 
Make sure you give your width and height of parent container a unit suffix on the value:

```
<div style="width:500px;height:500px;">
    <input type="button" style="width:100%;height:100%;"/>
</div>

```
```
$('document').ready(function() {
    $('input[type=button]').each(function(){
        $(this).height($(this).parent().height());
        $(this).width($(this).parent().width());
    });
});

```