function validateFields(isAdvSearch) {
	var objStart;
	var objEnd;
	var objZinsnede;
	var objSentence;
				
	objStart = document.getElementById('publicationdatestart');
	objEnd = document.getElementById('publicationdateend');
	
	if (isAdvSearch) {
		objSentence = document.getElementById('sentence');
		objFreetext = document.advsearch.freetext;

		if (objSentence.value != '') {
			objFreetext.value = '"' + objSentence.value + '"';
			objSentence.value = '';
		}
	}
						
	if (objStart.value == 'dd-mm-jjjj') {
		objStart.value = '';
	}
				
	if (objEnd.value == 'dd-mm-jjjj') {
		objEnd.value = '';
	}
																
	document.getElementById('riswijk').value = GetMultipleValue(document.getElementById('riswijk_input'));
	document.getElementById('risbeleidsterrein').value = GetMultipleValue(document.getElementById('risbeleidsterrein_input'));
}
						
function fillDateFields() {
	var objStart;
	var objEnd;
								
	objStart = document.getElementById('publicationdatestart');
	objEnd = document.getElementById('publicationdateend');
								
	objStart.value = 'dd-mm-jjjj';
	objEnd.value = 'dd-mm-jjjj';
}
				
					
function GetMultipleValue(elements) {
	var elements_i, element, result;
	result='';
	if (elements.length > 0) {
		for (elements_i=0; elements_i<elements.length; elements_i++)
		{
			element = elements[elements_i];
	  		if ((element.selected==true) && (element.value != ''))
			{
				if (result!=''){
					result+='",';
				}
				result+= '"';
				result+= element.value;
			}
		}
		if (result != '')
		{
			result += '"';
		}
	}
	//alert(result);
	return result;
}