How to change background color and color to the text using javascript

Here we are using onchange() for changing the text colors and background colors. 

Select Black Select Red Select Blue Select Green
Select Black Select Red Select Blue Select Green Sample Code

 

<script>
function color(){
	var color = document.getElementById('color').value;
	document.getElementById('text').style.color = color;
}
function textBgcolor(){
	var color = document.getElementById('bgcolor').value;
	document.getElementById('text').style.backgroundColor = color;
}
</script>
<select onchange="color()" id="color">
<option value="black">Select Black</option>
<option value="red">Select Red</option>
<option value="blue">Select Blue</option>
<option value="green">Select Green</option>
</select><br>
<select onchange="textBgcolor()" id="bgcolor">
<option value="black">Select Black</option>
<option value="red">Select Red</option>
<option value="blue">Select Blue</option>
<option value="green">Select Green</option>
</select>
<div id="text">Sample Code</div>