function jQueryById(id) {
		return new jQuery(document.getElementById(id));
	}
<link rel="stylesheet" id="sap-ui-theme-sap.ui.layout" href="../../../../../resources/sap/ui/layout/themes/sap_belize/library.css" data-marker="42">
<div id="includeStyleSheetTest" class="sap-jsunitIncludeStyleSheetTest" >
  Test area for includeStyleSheet
</div>