<html>
<body>
<form id="myCarForm">
Favorite Car: <input type="text" name="fname" value="Volvo">
</form>
<form id="myColorForm">
Favorite Color: <input type="text" name="favcolor" value="Blue">
</form>
<p>Click the button to display the id of the first form element (index 0) in the document.</p>
<button onclick="myFunction()">Try it</button>
<p id="demo"></p>
<script>
function myFunction() {
var x = document.forms[0].id;
document.getElementById("demo").innerHTML = x;
}
</script>
</body>
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</html>