function sendData(formname) {
	formtosubmit = eval('document.' +formname);
	formredirect = formname +'_bedankt.html';
	//validate form data
	missingvalues = true;
	for(i = 0; i < formtosubmit.length; i++) {
		field_name = formtosubmit.elements[i].name;
		if (field_name.indexOf("_verplicht") != -1) {
		    if (formtosubmit.elements[i].value == "") {
				formtosubmit.elements[i].style.backgroundColor = "#294f58";
				formtosubmit.elements[i].style.color = "#ffffff";
				missingvalues = false;
				} else {
					formtosubmit.elements[i].style.backgroundColor = "#cad6d6";
					formtosubmit.elements[i].style.color = "#294f58";
			}
		}
	}
	//submit if missingvalues true
	if (missingvalues == true) {
		formtosubmit.submit();
	}
}