function validateFulltextSearchOnSubmit() {
		if(!document.getElementById('cerca').value) {
		  alert('Verkeerde ingave');
		}
		else {
		  var keySearch = trim(document.getElementById('cerca').value);
		  var query = 'title:';
		  query += keySearch+'* ';
		  query += 'OR author:';
		  query += keySearch+'* ';
		  query += 'OR subtitle:';
		  query += keySearch+'* ';
		  query += 'OR attachments:';
		  query += keySearch+'* ';

		  document.getElementById('library_query').setAttribute('value',query);
		  document.fulltextSearch_form.query.value = query;
		  //alert(document.getElementById('query').value);
		  document.getElementById('fulltextSearch_form').submit();
		}
	}

	function trim(str) {
		reTrim = /\s+$|^\s+/g;
		return str.replace(reTrim,"");
	}