attributes

js/script.js

function funMake() {
for(var i=0, j=0; i<document.getElementById('f1').attributes.length; i++, j++) {
document.write(document.getElementById('f1').attributes[i].nodeName+' : ');
document.write(document.getElementById('f1').attributes[j].nodeValue+'<br />');
}
}

function funMake() {
for(var i=0, j=0; i<document.getElementById('f1').attributes.length; i++, j++) {
document.write(document.getElementById('f1').attributes[i].nodeName+' : ');
document.write(document.getElementById('f1').attributes[j].nodeValue+'<br />');
}
}

index.html

<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8" />
<title>New Page</title>
<script src="js/script.js"></script>
</head>
<body>
<form id="f1" action="#" method="post" name="form0">
<input type="text" name="text0" />
  
<input type="submit" name="perform" value="send" />
</form>
<br />
<script>
funMake();
</script>
</body>
</html>

<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8" />
<title>New Page</title>
<script src="js/script.js"></script>
</head>
<body>
<form id="f1" action="#" method="post" name="form0">
<input type="text" name="text0" />
  
<input type="submit" name="perform" value="send" />
</form>
<br />
<script>
funMake();
</script>
</body>
</html>