var nrOfTabs = 3;
	
	function fnToggle(Id) {
		for (i=1; i<=nrOfTabs ; i++) {
			document.getElementById('content-' + i).style.display = 'none';
		}
		document.getElementById('content-' + Id).style.display = 'block';
	}
	function changepics(Id) {
		var obj  = document.getElementById("pics");
		var pics = document.getElementById("pics" + Id);
		var url = pics.src; url = url.replace('xsmall', 'large'); obj.src = url;
	}
	function fnChkSelectBox(obj) {
		for (i=0; i<obj.options.length; i++) {
			if (obj.options[i].selected) {
				if(obj.options[i].value == '0') { fnSetAllValuesSelected(obj) }
			}
		}
	}
	function clearDefault(el) {
 		 if (el.defaultValue == el.value) el.value = ""
	}
	
	function setDefaultPhone(el) {
		if(el.value == '') {
			el.value = "UW TELEFOONNUMMER"
		}
	}
	function setDefaultDate(el) {
		if(el.value == '') {
			el.value = "TIJDSTIP"
		}
	}
	function fnSetAllValuesSelected(obj) {
		for (i=0; i<obj.options.length; i++) { obj.options[i].selected = false; }
		obj.options[0].selected = true;
	}
	function fnSearch() {
		document.forms.frmSearch.submit();
	}
	function fnChgPage(PageNr) {
		var oFrm = document.forms.frmSearchResults;
		oFrm.PageNr.value = PageNr;
		oFrm.submit();
	}
	function fnChangeSort(nSortField, nSortOrder) {
		var oFrm = document.forms.frmSearchResults;
		oFrm.PageNr.value = 1;
		oFrm.SortField.value = nSortField;
		oFrm.SortOrder.value = nSortOrder;
		oFrm.submit();
	}
	
	function fnChkCallMeNowFrm() {
		var msgErr		= "De volgende velden zijn niet, of niet juist, ingevuld:\n\n";
		var msgPhone	= "- uw telefoonnummer\n";
		var msgDate		= "- een datum/tijdstip\n";	
		
		var oFrm = document.forms.frmCallMeNow;
		var errLvl = 0;
		var errMsg = "";
	
		if((oFrm.txtPhone.value == '') || (oFrm.txtPhone.value == 'UW TELEFOONNUMMER')) { errLvl = 1; errMsg += msgPhone; }
		if((oFrm.txtDate.value == '') || (oFrm.txtDate.value == 'TIJDSTIP')) { errLvl = 1; errMsg += msgDate; }
		
		if(errLvl != 0) {
			alert(msgErr + errMsg);
		} else {
			oFrm.submit();
		}
	}