function check_date(fld) {
	var date_parts = fld.value.split('-');
	if(date_parts.length != 3) {
		return false;
	}else {
		if(date_parts[0].length == 1) {
			date_parts[0] = '0'+date_parts[1];
		}else if(date_parts[0].length != 2) {
			return false;
		}
		if(date_parts[1].length == 1) {
			date_parts[1] = '0'+date_parts[1];
		}else if(date_parts[1].length != 2) {
			return false;
		}
		if(date_parts[2].length == 2) {
		var tmpDate = new Date();
		var year = tmpDate.getFullYear().toString();
		year = year.substring(0,2);
		date_parts[2] = year + date_parts[2];
		}else if(date_parts[2].length != 4) {
			return false;
		}
		fld.value = date_parts.join('-');
		var objTempDate = new Date(date_parts[2],date_parts[1]-1,date_parts[0]);
		if(objTempDate.getFullYear() != date_parts[2] 
			|| objTempDate.getMonth() != date_parts[1]-1
			|| objTempDate.getDate() != date_parts[0]
			) {
			return false;
		}
	}
	return true;
}

function check_date_in_future(fld) {
	if(check_date(fld)) {
		var date_parts = fld.value.split('-');
		var objTempDate = new Date(date_parts[2],date_parts[1]-1,date_parts[0]);
		var objCurrDate = new Date();
		if(objTempDate >= objCurrDate) {
			return true;
		}else {
			return false;
		}
	}else {
		return false;
	}
}

function check_date_in_past(fld) {
	if(check_date(fld)) {
		var date_parts = fld.value.split('-');
		var objTempDate = new Date(date_parts[2],date_parts[1]-1,date_parts[0]);
		var objCurrDate = new Date();
		if(objTempDate < objCurrDate) {
			return true;
		}else {
			return false;
		}
	}else {
		return false;
	}
}

function checkForm(frm, ruleset) {
	var reqErrors = new Array();
	var valErrors = new Array();
	var eersteError;
	// Velden controleren op vereist en valideer de velden.
	for(i = 0; i < frm.length; i++) {
		var veld = frm.elements[i];
		var reqError = false;
		// Controleer of het veld vereist is.
		for(j = 0; j < ruleset.required.length; j++){
			elemId = ruleset.required[j];
			if(veld.name == elemId || veld.name == elemId+"[]") {
				// Controleren of veld ingevuld is.
				var regex = /^\s+$/;
				if(veld.value == null || veld.value == '' || regex.test(veld.value)){
					reqErrors[reqErrors.length] = ruleset.reqerrors[elemId];
					reqError = true;
					if(eersteError == null) {
						eersteError = veld;
					}
				}
				// Controleren of checkbox/radiobutton aangevinkt is.
				else if(veld.type == 'checkbox') {
					var checked = false;
					for(k=i; frm.elements[k].name == veld.name; k++) {
						if(frm.elements[k].checked) {
							checked = true;
						}
					}
					if(!checked) {
						reqErrors[reqErrors.length] = ruleset.reqerrors[elemId];
						reqError = true;
						if(eersteError == null) {
							eersteError = veld;
						}
					}
					i = k-1;
				}else if(veld.type == 'radio') {
					var checked = false;
					for(k=i; frm.elements[k].name == veld.name; k++) {
						if(frm.elements[k].checked) {
							checked = true;
						}
					}
					if(!checked) {
						reqErrors[reqErrors.length] = ruleset.reqerrors[elemId];
						reqError = true;
						if(eersteError == null) {
							eersteError = veld;
						}
					}
					i = k-1;
				}
			}
		}
		// Controleer of het veld gevalideerd moet worden.
		if(!reqError) {
			for(m = 0; m < ruleset.valfields.length; m++) {
				if(veld.name == ruleset.valfields[m]) {
					elemId = ruleset.valfields[m];
					var err = false;
					if(ruleset.regex_checks[elemId] != null) {
						//Veld valideren met regex.
						var regex = new RegExp(ruleset.regex_checks[elemId]);
						var regexWSpace = /^\s+$/m;
						if(!regex.test(veld.value) && !regexWSpace.test(veld.value) && veld.value != '' && veld.value != null) {
							err = true;
						}
					}else if(ruleset.other_checks[elemId] != null) {
						var val = ruleset.other_checks[elemId];
						switch(val) {
							case "date":
								if(!check_date(veld)) {
									err = true;
								}
							break;
							case "date_future":
								if(!check_date_in_future(veld)) {
									err = true;
								}
							break;
							case "date_past":
								if(!check_date_in_past(veld)) {
									err = true;
								}
							break;
							default:
							break;
						}
					}
					if(err) {
						valErrors[valErrors.length] = ruleset.valerrors[elemId];
						if(eersteError == null) {
							eersteError = veld;
						}
					}
				}
			}
		}
	}
	// Opbouwen vereiste velden errors.
	var errorMsg;
	var veld;
	if(reqErrors.length == 1){
		errorMsg = reqErrors[0];
	}
	else if(reqErrors.length > 1) {
		for(n = 0; n < reqErrors.length; n++) {
			if(errorMsg != null) {
				errorMsg += "\n" + reqErrors[n];
			}else {
				errorMsg = reqErrors[n];
			}
		}
	}
	// Opbouwen validatie errors.
	if(valErrors.length == 1) {
		if(errorMsg != null) {
			errorMsg += "\n\n" + valErrors[0];
		}else {
			errorMsg = valErrors[0];
		}
	}else if(valErrors.length > 1) {
		if(errorMsg != null) {
			errorMsg += "\n";
		}
		for(o = 0; o < valErrors.length; o++) {
			if(errorMsg != null) {
				errorMsg += "\n" + valErrors[o];
			}else {
				errorMsg = valErrors[o];
			}
		}
	}

	// Error weergeven aan gebruiker.
	if(errorMsg != null) {
		alert(errorMsg);
		eersteError.focus();
		return false; // Er was een fout, niet submitten.
	}else {
		return true; // Submit het form.
	}
	// Oude errors uit formulier weghalen.
	// Error toevoegen aan veld.*/
}