$(document).ready(function(){ 
   $("#date").focus(function (e) {  if(e.target.value=="dd/mm/yy") {e.target.value="";} });
   $("#time").focus(function (e) { if(e.target.value=="hh:mm") {e.target.value="";} });
   $("#time").blur(function (e) { if(e.target.value=="") {e.target.value="hh:mm";} }); 
   $("#date").blur(function (e) { if(e.target.value=="") {e.target.value="dd/mm/yy";} });
   $("#submit").click(function(e){
     var warning="";
     if($("#name").val()=="") { e.preventDefault(); warning=warning+"- Name\n"; }
     if($("#adress").val()=="") { e.preventDefault(); warning=warning+"- Address\n"; }
     if($("#phone").val()=="") { e.preventDefault(); warning=warning+"- Phone\n"; }
     if($("#email").val()=="") { e.preventDefault(); warning=warning+"- Email\n"; }
     if($("#persons").val()=="") { e.preventDefault(); warning=warning+"- Nr. of guests\n"; }
     if($("#type").val()=="") { e.preventDefault(); warning=warning+"- Event type\n"; }
     if($("#catering_text").val()=="") { e.preventDefault(); warning=warning+"- Catering per 1 guest\n"; }
     if($("#personal_knowledge").val()=="") { e.preventDefault(); warning=warning+"- Staff should speak.\n"; }
     if($("#city").val()=="") { e.preventDefault(); warning=warning+"- City\n"; }
     if($("#country").val()=="") { e.preventDefault(); warning=warning+"- Country\n"; }
     if($("#date").val()=="") { e.preventDefault(); warning=warning+"- Event date\n"; }
     if($("#time").val()=="") { e.preventDefault(); warning=warning+"- Event time\n"; }
     if(!$("#agree").is(":checked")) { e.preventDefault(); warning=warning+"- Please check General Terms and Conditions agreement.\n"; }
     if(warning!="") alert("The following field is required:\n\n"+warning);
   });
});