A #javascript #bookmarklet : Find the nearest anchor from your click

myAnchor.js

(function() {

	// Attributes
	var reg = new RegExp( '" id="([^"]*)"', 'g' ),
		popin = new bm_popin( 1892731 );
	popin.title( 'myAnchor' );
	popin.text( 'Click on your page' );

	// Recursive function
	function get_previous_node_id( node, parse ) {
		if ( node.id ) {
			return '#' + node.id;
		}
		if ( node.name ) {
			return '#' + node.name;
		}
		if ( parse ) {
			var exec = reg.exec( node.innerHTML );
			if ( exec != null && exec.length > 1 ) {
				return '#' + exec[ 1 ];
			}
		}
		if ( node.previousSibling != null ) {
			return get_previous_node_id( node.previousSibling, true );
		}
		if ( node.parentNode != null ) {
			return get_previous_node_id( node.parentNode, false );
		}
		return '#';
	}

	// Event handler
	document.body.onclick = function( event ) {
		var anchor = get_previous_node_id( event.target );
		popin.text( 'The anchor is: \n' + anchor );
		window.location.hash = anchor;
		document.body.onclick = null;
		return false;
	}
})();