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Required Fields
 
 
The function below checks if a required field has been left empty. If the required field is blank, an alert box alerts a message and the function returns false. If a value is entered, the function returns true (means that data is OK):
 
 
  1. <html>

  2. <head>

  3. <script type="text/javascript">

  4. function validate_required(field,alerttxt)

  5. {

  6. with (field)

  7. {

  8. if (value==null||value=="")

  9.   {alert(alerttxt);return false;}

  10. else {return true}

  11. }

  12. }

  13.  

  14. function validate_form(thisform)

  15. {

  16. with (thisform)

  17. {

  18. if (validate_required(email,"Email must be filled out!")==false)

  19.   {email.focus();return false;}

  20. }

  21. }

  22. </script>

  23. </head>

  24.  

  25. <body>

  26. <form action="submitpage.htm"

  27. onsubmit="return validate_form(this)"

  28. method="post">

  29. Email: <input type="text" name="email" size="30">

  30. <input type="submit" value="Submit">

  31. </form>

  32. </body>

  33.  

  34. </html>
 
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  Date entered : 25th Mar 2008
  Rating : No Rating
  Accessed  :  1585
  Submitted by :  goldeekhan
 
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