/**
 * Adds query string parameter to links
 * @param linkClass Class selector for links to add parameter to
 * @param queryStringParam Parameter to add
 */

function addLinkParam(linkClass, queryStringParam) {
	// find all dealer links on page
	var allLinks = $(document.getElementsByClassName(linkClass));
	// iterate through dealer links
	allLinks.each(function(link) {
		// check for existing query string
		var paramPrefix = '?';
		if (link.search !== '') {
			paramPrefix = '&';
		}
		// update links w/new param
		link.href = link.href + paramPrefix + queryStringParam;
	});
}