<!DOCTYPE html>
<html>
<head>
<script>
function changeLink()
{
var a = document.getElementById('inc').value;
var b = ++a;
document.getElementById('inc').value= b;
}
</script>
</head>
<body>
<a id="myAnchor" onclick="changeLink()" href="#">click</a>
<input type="button" id ="inc" value="1">
</body>
</html>
<html>
<head>
<script>
function changeLink()
{
var a = document.getElementById('inc').value;
var b = ++a;
document.getElementById('inc').value= b;
}
</script>
</head>
<body>
<a id="myAnchor" onclick="changeLink()" href="#">click</a>
<input type="button" id ="inc" value="1">
</body>
</html>
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