<input type="button" id="get_attribute" value="Get Attribute">
<input type="button" id="set_attribute" value="Set Attribute">
<input type="button" id="set_multiple_attribute" value="Set Multiple Attribute">
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<script src="https://ajax.googleapis.com/ajax/libs/jquery/1.12.2/jquery.min.js"></script>
<script>
$('#get_attribute').click(function(){
var link = $('a').attr('href');
alert(link);
}); ...