jquery實現表單驗證並阻止非法提交，jquery實現表單提交

jquery實現表單驗證並阻止非法提交，jquery實現表單提交

代碼檢測textarea內填寫的長度，未填寫時提示需要重新填寫，少於15字元時提示需要長於15字元，成功時顯示所填寫建議。

<script type="text/javascript">//jQuery代碼function confirm(){　　if($("#advice").val().length == 0){　　alert("We can't see your advice. Maybe you should fill the form first.");　　$("#advice").focus();　　return false;}else if($("#advice").val().length <= 15){　　alert("Your advice should longer than 15 letters.");　　$("#advice").focus();　　return false;}else{　　alert("Thank you for your advice! You will get out reply in 24 hours for advice:\n"+$("#advice").val());　　return true;}}</script><form action="" method="post" onSubmit="return confirm();" >　　<textarea id="advice" rows="20" cols="50"placeholder="Give us some advice?"></textarea>　　 <input type="submit"value="Thank you"/></form>

>關鍵點

1.必須要有onSubmit="return confirm();" return 這個詞，不可缺少。
2.自行完整的網頁結構。

以上所述就是本文的全部內容了，希望大家能夠喜歡。