function form_forward(){
    var regexDatum = /^(((0?[1-9]|[12]\d|3[01])\.(0[13578]|[13578]|1[02])\.((1[6-9]|[2-9]\d)\d{2}))|((0?[1-9]|[12]\d|30)\.(0[13456789]|[13456789]|1[012])\.((1[6-9]|[2-9]\d)\d{2}))|((0?[1-9]|1\d|2[0-8])\.0?2\.((1[6-9]|[2-9]\d)\d{2}))|(29\.0?2\.((1[6-9]|[2-9]\d)(0[48]|[2468][048]|[13579][26])|((16|[2468][048]|[3579][26])00))))$/;

	var startdate = document.getElementById("startdate").value;
	var starthours = document.getElementById("starthours").value;
	var startmins = document.getElementById("startmins").value;
	var startplace = document.getElementById("startplace").value;
	
	var enddate = document.getElementById("enddate").value;
	var endhours = document.getElementById("endhours").value;
	var endmins = document.getElementById("endmins").value;
	var endplace = document.getElementById("endplace").value;
	
	var cartyp = document.getElementById("cartyp").value;
    //(startdate.match(regexDatum)) && (enddate.match(regexDatum)) && 
	if((startdate.match(regexDatum)) && (enddate.match(regexDatum)) && (startdate != "") && (startplace != "0") && (enddate != "") && (cartyp != "0"))
	{
		window.location = "mietwagen-buchung.aspx?m1=" + startplace + "&m2=" + endplace + "&t1=" + startdate + " " + starthours + ":" + startmins + "&t2=" + enddate + " " + endhours + ":" + endmins + "&tip=" + cartyp + "";
	}
	else
	{
		alert("Bitte tragen Sie alle Daten ein.");
	}
}

//brojosoba.match(/^\d+$/)