I want to create one(or two) button(s) to switch my theme from dark to bright, i didn't know anything about jquery but I read something in w3schools and other references so I wrote a Jquery function that change some properties in my css file:

```
<script>
$(document).ready(function(){
    $("button").click(function(){
        $("p").css({
            "color": "white",

        });
        $("div").css({
"background-color" : "black",});
    });
});

</script>

```

I put this script in bottom of header tag in header.php file, and I add a button to the footer of site

```
<button class="bright">طرح روشن</button>

```

but when I click on the button nothings happen, when I try this code on [w3shcools editor](http://www.w3schools.com/jquery/tryit.asp?filename=tryjquery_css_property_sets) it works but the button in [my wordpress site](http://rangeman.ir) does nothing.
here is my code in W3shcools editor:

```
<!DOCTYPE html>
<html>
<head>
<script src="https://ajax.googleapis.com/ajax/libs/jquery/1.11.3/jquery.min.js"></script>
<script>
$(document).ready(function(){
    $("button").click(function(){
        $("p").css({
            "color": "white",
            "background-color": "#98bf21",
            "font-family": "Arial",
            "font-size": "20px",
            "padding": "5px"
        });
    });
});
</script>
</head>
<body>

<button>Set multiple CSS properties for all p elements</button>

<p>This is a paragraph.</p>
<p>This is another paragraph.</p>

</body>
</html>

```

And if there is a way to call that function with "href" I will grateful to help me how can I call it.