function kontrparag(){
    with (document.kontaktform) {
	if (email.value==""){
            alert("ERR#1001:\n\nNezadali jste Vas email.");
            return false;
        }

        if (!email.value.match("^[_a-zA-Z0-9\.\-]+@[_a-zA-Z0-9\.\-]+\.[a-zA-Z]{2,4}$")) {
            alert("ERR#1005:\n\nSpatny format emailove adresy.");
            return false;
	}
	
	if (name.value==""){
            alert("ERR#1002:\n\nNezadali jste Vase jmeno.");
	    return false;
	}
	
	if (text.value==""){
            alert("ERR#1003:\n\nNezadali jste text prispevku.");
	    return false;
	}
    }
}

function domainparag(){
    with (document.domform) {
	if (checkdomain.value==""){
            alert("ERR#1007:\n\nNezadali jste nazev domeny");
            return false;
        }    }
}

function NastavZone(zone){

		neco='zpusob'+zone;

                document.getElementById(neco).checked=true;

}

function NastavPlatby(){

                document.getElementById("zpusob").checked=true;
                document.getElementById("faktura").checked=true;
                document.getElementById("time").checked=true;

}

function ZobrazRegForm(){

	if(document.getElementById("zpusobA").checked==true){

		document.getElementById("regzonea").style.display = "block";
                document.getElementById("regzoneb").style.display = "none";
                document.getElementById("regzonec").style.display = "none";

	}	

        if(document.getElementById("zpusobB").checked==true){

                document.getElementById("regzonea").style.display = "none";
                document.getElementById("regzoneb").style.display = "block";
                document.getElementById("regzonec").style.display = "none";

        }

        if(document.getElementById("zpusobC").checked==true){

                document.getElementById("regzonea").style.display = "none";
                document.getElementById("regzoneb").style.display = "none";
                document.getElementById("regzonec").style.display = "block";

        }

}

function ZobrazForm(){

	if(document.getElementById("zpusobA").checked==true){

		document.getElementById("regzonea").style.display = "block";
                document.getElementById("regzoneb").style.display = "none";
                document.getElementById("regzonec").style.display = "none";
                document.getElementById("regzoned").style.display = "none";

	}	

	if(document.getElementById("zpusobB").checked==true){

		document.getElementById("regzonea").style.display = "block";
                document.getElementById("regzoneb").style.display = "block";
                document.getElementById("regzonec").style.display = "none";
                document.getElementById("regzoned").style.display = "none";

	}	

	if(document.getElementById("zpusobC").checked==true){

		document.getElementById("regzonea").style.display = "block";
                document.getElementById("regzoneb").style.display = "block";
                document.getElementById("regzonec").style.display = "block";
                document.getElementById("regzoned").style.display = "none";

	}	

	if(document.getElementById("zpusobD").checked==true){

		document.getElementById("regzonea").style.display = "none";
                document.getElementById("regzoneb").style.display = "none";
                document.getElementById("regzonec").style.display = "none";
                document.getElementById("regzoned").style.display = "block";

	}	

}
function CheckDomain(){

        if (!document.getElementById("domain").value.match("^[_a-zA-Z0-9\.\-]+@[_a-zA-Z0-9\.\-]+\.[a-zA-Z]{2,4}$")) {
            alert("ERR#1005:\n\nDomena neni ve spravnem formatu");
            return false;         
        }

}