$(document).ready(  
    function () { 
        
    $("#absenden_knopf").click( function() {

	// Obligatorische Variablen ------- //
	var vorname = $("#vorname").attr("value");
	var name    = $("#name").attr("value");
	var firma   = $("#firma").attr("value");
	var adresse = $("#adresse").attr("value");
	var email   = $("#email").attr("value");
	var message = "";
	
	if (!vorname) {
	    $("#vorname").attr({"class":"text required-input"})
	    message = message + "First Name/Vorname\n";
	}
	if (!name) {
	    $("#name").attr({"class":"text required-input"})
	    message = message + "Last Name/Name\n";
	}
	if (!firma) {
	    $("#firma").attr({"class":"text required-input"})
	    message = message + "Company/Firma\n";
	}
	if (!adresse) {
	    $("#adresse").attr({"class":"text required-input"})
	    message = message + "Address/Adresse\n";
	}
	if (!email) {
	    $("#email").attr({"class":"text required-input"})
	    message = message + "E-Mail\n";
	}
	
	
	//$("#pfaff-form").fadeOut(800);
	if (message != "") {
	    message = "Bitte geben Sie mindestens die folgenden Daten ein:\nPleser fill in at least the following fields\n\n" + message;
	    alert(message);  
            return false;  
	}
	//$("#pfaff-form").fadeIn(200);
        
        
	
    });    
       
        
        // ende ---
    }
);