re = /^[^.]+(\.[^.]+)*@([^.]+[.])+[a-z]{2,4}$/;



function sendkontakt() {
	jmeno=document.sendkontakt.jmeno.value;
	kontakt=document.sendkontakt.kontakt.value;
	email=document.sendkontakt.email.value;
	dotaz=document.sendkontakt.dotaz.value;
 
} 

function kontrola3() {
  jmeno=document.sendkontakt.jmeno.value;
	kontakt=document.sendkontakt.kontakt.value;
	email=document.sendkontakt.email.value;
	dotaz=document.sendkontakt.dotaz.value;
  if (jmeno==" "||jmeno==""||jmeno==null||jmeno=="Insert your name"){
			alert("Please, insert your name!");
    document.sendkontakt.jmeno.focus();
    document.sendkontakt.jmeno.select();
			return false;
	}

  if (kontakt==" "||kontakt==null||kontakt==""||kontakt=="Insert your phone"){
			alert("Please, insert your phone!");
    document.sendkontakt.kontakt.focus();
    document.sendkontakt.kontakt.select();
			return false;
	}

  if (email==" "||email==null||email==""||email=="Insert your e-mail"){
			alert("Please, insert your e-mail!");
    document.sendkontakt.email.focus();
    document.sendkontakt.email.select();
			return false;
	} 	
  if ( document.sendkontakt.email.value != "" ) {
		if (re.test(document.sendkontakt.email.value) == 0) {
			alert ("E-mail adress is not valid, please try again.");
			document.sendkontakt.email.focus();
			document.sendkontakt.email.select();
			return false;
		}
	}
}







function sendemail() {
	email=document.sendemail.email.value;
} 
function kontrola() {
  email=document.sendemail.email.value;
  if (email==" "||email==null||email==""||email=="Insert your e-mail"){
		alert("Please, insert your e-mail!");
    document.sendemail.email.focus();
    document.sendemail.email.select();
		return false;
  }
  if ( document.sendemail.email.value != "" ) {
		if (re.test(document.sendemail.email.value) == 0) {
		alert ("E-mail adress is not valid, please try again.");
		document.sendemail.email.focus();
		document.sendemail.email.select();
		return false;
		}
	}
}





function sendquestion() {
	jmeno=document.sendquestion.jmeno.value;
	email=document.sendquestion.email.value;
	dotaz=document.sendquestion.dotaz.value;

}
function kontrola2() {
  jmeno=document.sendquestion.jmeno.value;
	email=document.sendquestion.email.value;
	dotaz=document.sendquestion.dotaz.value;
  if (jmeno==" "||jmeno==""||jmeno==null||jmeno=="Insert your name"){
			alert("Please, insert your name!");
    document.sendquestion.jmeno.focus();
    document.sendquestion.jmeno.select();
			return false;
	}
  if (email==" "||email==null||email==""||email=="Insert your e-mail") {
	   alert("Please, insert your e-mail!");
	   document.sendquestion.email.focus();
	   document.sendquestion.email.select();
	   return false;
	}
	if ( document.sendquestion.email.value != "" ) {
		if (re.test(document.sendquestion.email.value) == 0) {
			alert ("E-mail adress is not valid, please try again.");
			document.sendquestion.email.focus();
			document.sendquestion.email.select();
			return false;
		}
	}
	if (dotaz==" "||dotaz==""||dotaz==null||dotaz=="Insert your message"){
			alert("Plaese, insert your message!");
    document.sendquestion.dotaz.focus();
    document.sendquestion.dotaz.select();
			return false;
	}
	
}