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jQuery表单验证功能实例

2019-11-20 11:39:34
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本文实例讲述了jQuery表单验证功能。分享给大家供大家参考。具体如下:

这里使用jquery实现的表单验证效果,以Ajax方式验证你的表单是否填写正确,如果验证不通过,会将表单元素背景变成红色,并给出提示信息,简单实用,jquery表单验证功能已经有很多了,本款表单验证特效看上去更简单,不懂Ajax的朋友,或许直接套用即可实现无刷新表单验证功能。

运行效果截图如下:

在线演示地址如下:

http://demo.VeVB.COm/js/2015/jquery-table-form-check-codes/

具体代码如下:

<!DOCTYPE html><head><meta http-equiv="Content-Type" content="text/html; charset=utf-8" /><title>jQuery表单验证</title><style type="text/css">body, input, textarea { font-size:12px; line-height:18px; font-family:Verdana, Geneva, sans-serif;}input {width:200px;}.submit {width:120px;}#error { color:red; font-size:10px; display:none;}.needsfilled { background:red; color:white;}</style><script type="text/javascript" src="jquery-1.6.2.min.js"></script><script type="text/javascript">$(document).ready(function(){ // Place ID's of all required fields here. required = ["name", "email", "message"]; // If using an ID other than #email or #error then replace it here email = $("#email"); errornotice = $("#error"); // The text to show up within a field when it is incorrect emptyerror = "Please fill out this field."; emailerror = "Please enter a valid e-mail."; $("#theform").submit(function(){   //Validate required fields  for (i=0;i<required.length;i++) {   var input = $('#'+required[i]);   if ((input.val() == "") || (input.val() == emptyerror)) {    input.addClass("needsfilled");    input.val(emptyerror);    errornotice.fadeIn(750);   } else {    input.removeClass("needsfilled");   }  }  // Validate the e-mail.  if (!/^([a-zA-Z0-9_/./-])+/@(([a-zA-Z0-9/-])+/.)+([a-zA-Z0-9]{2,4})+$/.test(email.val())) {   email.addClass("needsfilled");   email.val(emailerror);  }  //if any inputs on the page have the class 'needsfilled' the form will not submit  if ($(":input").hasClass("needsfilled")) {   return false;  } else {   errornotice.hide();   return true;  } }); // Clears any fields in the form when the user clicks on them $(":input").focus(function(){    if ($(this).hasClass("needsfilled") ) {   $(this).val("");   $(this).removeClass("needsfilled");  } });}); </script></head><body><form action="mail.php" id="theform" name="theform" method="post"> <p><label for="name">Name</label><br /><input id="name" type="text" value="" name="name" /></p> <p><label for="email">E-mail</label><br /><input id="email" type="text" value="" name="email" /></p> <p><label for="message">Message</label><br /><textarea id="message" rows="7" cols="30" name="message"></textarea></p> <p><input class="submit" type="submit" name="submit" value="Submit Form" /></p> <p id="error">表单中有错误信息!</p></form></body></html>

希望本文所述对大家的jquery程序设计有所帮助。

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