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May 23rd, 2018
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  1. function checkForm()
  2. {
  3. var checkvelden = new Array();
  4. var melding = '';
  5. checkvelden[0] = "achternaam";
  6. checkvelden[1] = "voornaam";
  7. checkvelden[2] = "email";
  8. for (i=0; i < checkvelden.length; i++)
  9. {
  10. if (document.myForm.elements[checkvelden[i]].value == '')
  11. {
  12. if (melding == '')
  13. {
  14. melding = checkvelden[i];
  15. }
  16. else
  17. {
  18. melding += ', ' + checkvelden[i];
  19. }
  20. }
  21. }
  22. if (melding == '')
  23. {
  24. return true;
  25. }
  26. else
  27. {
  28. melding = ' De volgende velden nog invullen aub: \n' + melding
  29. }
  30. alert(melding);
  31. }
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