Pleas,e can somoene tell me what EXACTLY means "this" in next example:
CODE
<!DOCTYPE html>
<html>
<head>
<script>
function setStyle(x)
{
document.getElementById(x).style.background="yellow";
}
</script>
</head>
<body>
<p>A function is triggered when one of the input fields get focus. The function changes the background-color of the input field.</p>
First name: <input type="text" id="fname" onfocus="setStyle(this.id)"><br>
Last name: <input type="text" id="lname" onfocus="setStyle(this.id)">
</body>
</html>
Many thanks!!!
