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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