function checkmail()
{
var sendermail=document.getElementById("sendermail").value;
var mailname=document.getElementById("mailname").value;  
var mailquestion=document.getElementById("mailquestion").value;   

if(sendermail === 'undefined' || !sendermail || mailname === 'undefined' || !mailname || mailquestion === 'undefined' || !mailquestion)            
  {  
  alert( "Alla f\u00E4lt \u00E4r obligatoriska.");
  return false;
  }
}