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September 11, 2016 11:10
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Old form validation
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| <!-- Hide the script from old browsers | |
| function containsblanks(s) | |
| { | |
| for(var i = 0; i < s.value.length; i++) | |
| { | |
| var c = s.value.charAt(i); | |
| if ((c == ' ') || (c == '\n') || (c == '\t')) | |
| { | |
| alert('The field must not contain whitespace'); | |
| return false; | |
| } | |
| } | |
| return true; | |
| } | |
| // end hiding --> |
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| <!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.0 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd"> | |
| <html> | |
| <head> | |
| <title>Simple JavaScript Example</title> | |
| <script type="text/javascript"> | |
| <!-- Hide the script from old browsers | |
| function containsblanks(s) | |
| { | |
| for(var i = 0; i < s.value.length; i++) | |
| { | |
| var c = s.value.charAt(i); | |
| if ((c == ' ') || (c == '\n') || (c == '\t')) | |
| { | |
| alert('The field must not contain whitespace'); | |
| return false; | |
| } | |
| } | |
| return true; | |
| } | |
| // end hiding --> | |
| </script> | |
| </head> | |
| <body> | |
| <h2>Username Form</h2> | |
| <form onSubmit="return(containsblanks(this.userName));" | |
| method="post" action="test.php"> | |
| <input type="text" name="userName" size=10> | |
| <input type="submit" value="SUBMIT"> | |
| </form> | |
| </body> | |
| </html> |
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