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.phpstudy.net/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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