javascript - JSP submits the form even though js returns false -
i'm trying validate form. trying confirm passwords. js shows alert , function return false still submits form next page.
<html> <head> <meta http-equiv="content-type" content="text/html; charset=utf-8"> <title>jsp page</title> <script> function validatepassword(){ var password=document.form1.password.value; var cpassword=document.form1.cpassword.value; if(password!=cpassword){ alert("password not match"); return false; }else{ return true; } } </script> </head> <body> <h1>hello world!</h1> <form name="form1" onsubmit="validatepassword();" action="login.jsp"> <table width="80%"> <tr> <td style="text-align: center;width:40%">password<font color="red">*</font>:</td> <td style="text-align: center"><input type="text" name="password" required size="35"></td> </tr> <tr> <td style="text-align: center">confirm <font color="red">*</font>:</td> <td style="text-align: center"><input type="text" name="cpassword" required size="35"></td> </tr> <input type="submit"> </form> </body> </html>
your handler not returning anything, use this:
onsubmit="return validatepassword();" 
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