function checkForm()  { 
	var error = false;
	numRegExp = /[^0-9]/;
	//emailRegExp = /^[_a-z0-9-]+(\.[_a-z0-9-]+)*@[a-z0-9-]+(\.[a-z0-9-]+)*(\.([a-z]){2,4})$/;
	emailRegExp = /^[a-zA-Z0-9._-]+@[a-zA-Z0-9.-]+\.[a-zA-Z]{2,4}$/;
	if(document.frm.naam.value==""){
		$("#naam").css({ borderColor: "#ff0000"});
		error=true;
	} 
	else{
		$("#naam").css({ borderColor: "#000000"});
	}

	if(document.frm.email.value==""){
		$("#email").css({borderColor: "#ff0000"});
		error=true;
	} 
	else if(!emailRegExp.test(document.frm.email.value)){
		$("#email").css({borderColor: "#ff0000"});
		error=true;
	}
	else{
		$("#email").css({ borderColor: "#000000"});
	}

	if(document.frm.telefoon.value==""){
		$("#telefoon").css({ borderColor: "#ff0000"});
		error=true;
	} 
	else{
		$("#telefoon").css({ borderColor: "#000000"});
	}
	if(document.frm.datum.value==""){
		$("#datum").css({ borderColor: "#ff0000"});
		error=true;
	} 
	else{
		$("#datum").css({ borderColor: "#000000"});
	}
	if(document.frm.aantal.value==""){
		$("#aantal").css({ borderColor: "#ff0000"});
		error=true;
	} 
	else if(document.frm.aantal.value>8){
		$("#aantal").css({ borderColor: "#ff0000"});
		alert("Voor reserveringen van meer dan 8 personen neem contact op met restaurant As.\n\nTelefoonnummer: 020 6440100");
		error=true;
	}
	else{
		$("#aantal").css({ borderColor: "#000000"});
	}

	if(!error){
		//$("#d-ifrm").show();
		//$("#d-frm").hide();
		document.frm.submit();
	}
	else{
		$("#alert").hide()
		$("#alert").slideDown()
	}
}
function noAlpha(obj){
	reg = /[^0-9]/g;
	obj.value =  obj.value.replace(reg,"");
 }