Detect duplicate id's in html document.

detect duplicate ids

jq = jQuery;

var collection = {};

// change selector to * for everything use it to limit the kinds of nodes that get inspected.
jq('[name*=amenities]').each(
	function(i,e){
		var found = jq('[id=' + e.id + ']');
		var count = found.length;

		if( count > 1 ) { 
			collection[e.id] = {'count':count,'elements':jq.makeArray(found)};
		}
	}
);

console.table(collection);