function contactform_check() {
	var error  = new Array();
	var values = new Array();
	for (key in felder) {
		val = document.getElementById("contactform_"+key).value;
		if (val == "" || val == " ") {
			error.push(felder[key]);
		}
	}
	
	var errorHTML = new Array();
	if (error.length > 0) {
		document.getElementById("contactform_error").innerHTML = '<b>'+contactFieldError+':</b><br />'+error.join(", ")+".";
		document.getElementById("contactform_error").style.display = "block";
	} else {
		document.getElementById("contactform").action = "";
		document.getElementById("contactform").submit();
	}
}