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<html> <head> <script type="text/javascript"> function validate() { x=document.myForm at=x.email.value.indexOf("@") code=x.code.value firstname=x.fname.value submitOK="True" if (at==-1) { alert("Not a valid e-mail!") submitOK="False" } if (code<1 \|\| code>5) { alert("The value must be between 1 and 5") submitOK="False" } if (firstname.length>10) { alert("Your name must be less than 10 characters") submitOK="False" } if (submitOK=="False") { return false } } </script> </head> <body> <form name="myForm" action="http://www.w3schools.com/JS/tryjs_submitpage.htm" onsubmit="return validate()"> Enter your e-mail: <input type="text" name="email" size="20"><br /> Enter a value from 1 to 5: <input type="text" id="tac" name="code" size="20"><br /> Enter your name, max 10 chararcters: <input type="text" name="fname" size="20"><br /> <input type="submit" value="Submit"> </form> </body> </html>
Edit the text above, and click on the button to see the result.

Edit the text above, and click on the button to see the result.