var REMAIL = /^[\w\.\-\']+@[\.\-\w]{2,}\.[a-z]{2,10}$/i;
function checkEmail(val) {
	return REMAIL.test(val);
}

function isFormValid() {
	
   if (!document.getElementById('sendPage').emailto.value || document.getElementById('sendPage').emailto.value==''){
    alert("Molimo ispunite e-mail polje");
    document.getElementById('sendPage').emailto.focus();
    return false;
  }
  if (!checkEmail(document.getElementById('sendPage').emailto.value) ){
    alert("Molimo, ispravite e-mail adresu");
    document.getElementById('sendPage').emailto.focus();
    return false;
  }
  document.getElementById('sendPage').submit();
  return true
}