function check_business() {

    var error = 0;
    var error_message = "Please fill out correctly:\n\n";  
    
    var name   	= document.userdata.name.value;  
    var email	= document.userdata.email.value;         

    if (name == "") {
        error_message = error_message + "* Please fill in your name.\n";
        error = 1;            
    }
    if (email == "") {
        error_message = error_message + "* Please fill in your e-mail address.\n";
        error = 1;            
    }																			
    if (error == 1) {
        alert(error_message);
        return false;
    }
    else {
        return true;
    }
} 

function check_contact() {

    var error = 0;
    var error_message = "Please fill out correctly:\n\n";  
    
    var anrede 	    = document.userdata.anrede.value;
    var vorname     = document.userdata.vorname.value;   
    var nachname    = document.userdata.nachname.value; 
    var firma	    = document.userdata.firma.value;  
    var telefon   	= document.userdata.telefon.value; 
    var email	    = document.userdata.email.value;
    var betreff   	= document.userdata.betreff.value; 
    var nachricht  	= document.userdata.nachricht.value; 
           
    if (anrede == "") {
        error_message = error_message + "* Please fill out your title.\n";
        error = 1;            
    } 
    if (vorname == "" || vorname.length < 3) {
        error_message = error_message + "* Please fill out your first name.\n";
        error = 1;            
    }
    if (nachname == "" || nachname.length < 3) {
        error_message = error_message + "* Please fill out your last name.\n";
        error = 1;            
    } 
    if (anrede == "Firma" && firma.length < 3) {
        error_message = error_message + "* Please fill out your firm.\n";
        error = 1;            
    }            
    if (email == "" || email.length < 3) {
        error_message = error_message + "* Please fill out your e-mail address.\n";
        error = 1;            
    }	
    if (betreff == "" || betreff.length < 3) {
        error_message = error_message + "* Please type in a subject.\n";
        error = 1;            
    } 
    if (nachricht == "" || nachricht.length < 3) {
        error_message = error_message + "* Please type in a message.\n";
        error = 1;            
    }     
    if (error == 1) {
        alert(error_message);
        return false;
    }
    else {
        return true;
    }
} 

function check_reserve() {

    var error = 0;
    var error_message = "Please fill out correctly:\n\n";  
    
    var anrede 	    = document.userdata.anrede.value;
    var vorname     = document.userdata.vorname.value;   
    var nachname    = document.userdata.nachname.value; 
    var firma	    = document.userdata.firma.value;  
    var telefon   	= document.userdata.telefon.value; 
    var email	    = document.userdata.email.value;
    var sitzplaetze	= document.userdata.sitzplaetze.value; 
    var nachricht  	= document.userdata.nachricht.value; 
           
    if (anrede == "") {
        error_message = error_message + "* Please fill out your title.\n";
        error = 1;            
    } 
    if (vorname == "" || vorname.length < 3) {
        error_message = error_message + "* Please fill out your first name.\n";
        error = 1;            
    }
    if (nachname == "" || nachname.length < 3) {
        error_message = error_message + "* Please fill out your last name.\n";
        error = 1;            
    } 
    if (anrede == "Firma" && firma.length < 3) {
        error_message = error_message + "* Please fill out your firm.\n";
        error = 1;            
    }            
    if (email == "" || email.length < 3) {
        error_message = error_message + "* Please fill out your e-mail address.\n";
        error = 1;            
    }	
    if (sitzplaetze == "") {
        error_message = error_message + "* Please type in num seats.\n";
        error = 1;            
    }      
    if (error == 1) {
        alert(error_message);
        return false;
    }
    else {
        return true;
    }
} 

function check_gutschein() {

    var error = 0;
    var error_message = "Please fill out correctly:\n\n";  
    
    var anrede 	    = document.userdata.anrede.value;
    var vorname     = document.userdata.vorname.value;   
    var nachname    = document.userdata.nachname.value; 
    var firma	    = document.userdata.firma.value;  
    var telefon   	= document.userdata.telefon.value; 
    var email	    = document.userdata.email.value;
    var gutscheinwert	= document.userdata.gutscheinwert.value; 
    var nachricht  	= document.userdata.nachricht.value; 
           
    if (anrede == "") {
        error_message = error_message + "* Please fill out your title.\n";
        error = 1;            
    } 
    if (vorname == "" || vorname.length < 3) {
        error_message = error_message + "* Please fill out your first name.\n";
        error = 1;            
    }
    if (nachname == "" || nachname.length < 3) {
        error_message = error_message + "* Please fill out your last name.\n";
        error = 1;            
    } 
    if (anrede == "Firma" && firma.length < 3) {
        error_message = error_message + "* Please fill out your firm.\n";
        error = 1;            
    }            
    if (email == "" || email.length < 3) {
        error_message = error_message + "* Please fill out your e-mail address.\n";
        error = 1;            
    }	
    if (gutscheinwert == "") {
        error_message = error_message + "* Please type in the value of gift coupon.\n";
        error = 1;            
    }      
    if (error == 1) {
        alert(error_message);
        return false;
    }
    else {
        return true;
    }
}