function kontrola(){
Wzor4=/^[ a-zA-Z.]+$/;
OK4=(Wzor4.test(form._ARRAIRPORT.value)==true && form._ARRAIRPORT.value.length!=0);
if(OK4==false){
window.alert("Complete all data");
return false;
}
Wzor5=/^[ a-zA-Z.]+$/;
OK5=(Wzor5.test(form._DEPAIRPORT.value)==true && form._DEPAIRPORT.value.length!=0);
if(OK5==false){
window.alert("Complete all data");
return false;
}
Wzor6=/^[ 0-9.-]+$/;
OK6=(Wzor6.test(form.DEPDATE.value)==true && form.DEPDATE.value.length!=0);
if(OK6==false){
window.alert("Fill departure date");
return false;
}
Wzor7=/^[ 0-9.-]+$/;
OK7=(Wzor7.test(form.ARRDATE.value)==true && form.ARRDATE.value.length!=0);
if(OK7==false){
window.alert("Fill arrival date");
return false;
}
return true;
}