jquery,表单验证代码检测textarea内填写的长度，未填写时提示需要重新填写，少于15字符时提示需要长于15字符，成功时显示所填写建议。 <script type="text/javascript">//jQuery代码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>>关键点 1.必须要有onSubmit="return confirm();" return 这个词，不可缺少。
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jquery,表单验证
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