Validate an input field with minimum and maximum values
<html> <head> <script type="text/javascript"> function validate(){ x=document.myForm txt=x.myInput.value if (txt>=1 && txt<=5) { return true }else{ alert("Must be between 1 and 5") return false } } </script> </head> <body> <form name="myForm" action="http://www.java2s.com" onsubmit="return validate()"> Enter a value from 1 to 5: <input type="text" name="myInput" size="20"> <input type="submit" value="Submit"> </form> </body> </html>