详解jQuery简单的表单应用

<form action="#" method="post" id="regFrom"> <fieldset> <legend>个人基本信息</legend> <div> <label for="username">名称：</label> <input id="username" type="text" /> </div> <div> <label for="pass">密码：</label> <input id="pass" type="passward" /> </div> <div> <label for="msg">详细信息：</label> <textarea id="msg" ></textarea> </div> </fieldset> </form>

.focus{ border: 1px solid #f00; background: #fcc; }

$(function(){ $(':input').focus(function(){ $(this).addClass('focus'); }).blur(function(){ $(this).removeClass('focus'); }); });

<form action="#" method="POST" id="regFrom"> <div class="msg"> <div class="msg_caption"> <span class="bigger">放大</span> <span class="small">缩小</span> </div> <div> <textarea id="comment" rows="8" cols="20">  多行文本框，多行文本框，多行文本框，多行文本框，多行文本框，多行文本框，多行文本框，多行文本框，多行文本框，多行文本框，多行文本框，多行文本框，多行文本框，多行文本框，多行文本框，多行文本框，多行文本框，多行文本框，多行文本框， </textarea> </div> </div> </form>

$(function(){ var $comment = $('#comment'); $('.bigger').click(function(){ if($comment.height() < 500){ $comment.height( $comment.height() + 50 ); } }); $('.small').click(function(){ if($comment.height() > 50){ $comment.height( $comment.height() - 50 );  } }); });

$(function(){ var $comment = $('#comment'); $('.bigger').click(function(){ if(!$comment.is(':animated')){ $comment.animate({scrollTop : '-=50'},400); } }); $('.small').click(function(){ if(!$comment.is(':animated')){ $comment.animate({scrollTop : '+=50'},400); } }); });

<form action="#" method="POST" id="regFrom"> <p>你爱好的运动</p> <input type="checkbox" name="items" value="足球" />足球 <input type="checkbox" name="items" value="篮球" />篮球 <input type="checkbox" name="items" value="羽毛球" />羽毛球 <input type="checkbox" name="items" value="乒乓球" />乒乓球 <br /> <input type="button" id="CheckedAll" value="全 选" /> <input type="button" id="CheckedNo" value="全不选" /> <input type="button" id="CheckedRev" value="反 选" /> <input type="button" id="send" value="提 交" /> </form>

$('#CheckedAll').click(function(){ $('[name=items]:checkbox').attr('checked',true); }); $('#CheckedNo').click(function(){ $('[name=items]:checkbox').attr('checked',false); });

 $('#CheckedRev').click(function(){ $('[name=items]:checkbox').each(function(){ this.checked = !this.checked; }); });

var str = "你选中的是：/r/n"; $('#send').click(function(){  $('[name=items]:checkbox:checked').each(function(){ str += $(this).val() + "/r/n"; }); alert(str); });

<div class="centent"> <select multiple id="select1" style="width:100px;height:160px;"> <option value="1" >选项1</option> <option value="2" >选项2</option> <option value="3" >选项3</option> <option value="4" >选项4</option> <option value="5" >选项5</option> <option value="6" >选项6</option> <option value="7" >选项7</option> <option value="8" >选项8</option> </select> <div> <span id="add">选中添加到右边>></span><br /> <span id="add_all">全部添加到右边>></span> </div> </div> <div class="centent"> <select multiple id="select2" style="width:100px;height:160px;"></select> <div> <span id="remove"><<选中删除到左边</span><br /> <span id="remove_all"><<全部删除到左边</span> </div> </div>

 $('#add').click(function(){ var $options = $('#select1 option:selected'); $options.appendTo($('#select2')); });

 $('#add_all').click(function(){ var $options = $('#select1 option'); $options.appendTo($('#select2')); });

$('#select1').dblclick(function() { var $options = $('option:selected'); $options.appendTo($('#select2')); });

<form methos="post" action=""> <div class="int"> <label for="username">用户名</label> <input type="text" id="username" class="required" /> </div> <div class="int"> <label for="email">邮箱</label> <input type="text" id="email" class="required" /> </div> <div class="int"> <label for="personinfo">个人资料</label> <input type="text" id="personinfo" /> </div> <div class="sub"> <input type="submit" value="提交" id="send" /> <input type="reset" id="red" /> </div> </form>

$('form :input').blur(function(){ var $parent = $(this).parent(); // 删除以前的提示元素 $parent.find(".formtips").remove(); // 验证用户名 if($(this).is('#username')){ if(this.value == '' || this.value.length < 6){  var errorMsg = '请输入至少6位的用户名';  $parent.append('<span class="formtips onError">'+errorMsg+' </span>'); }else{  var okMsg = '输入正确';  $parent.append('<span class="formtips onSuccess">'+okMsg+'</span>'); } } // 验证邮箱 if($(this).is('#email')){ if(this.value == '' || (this.value != "" && !/.+@.+/.[a-zA-Z] {2,4}$/.test(this.value))){  var errorMsg = '请输入正确的E-Mail地址';  $parent.append('<span class="formtips onError">'+errorMsg+' </span>'); }else{  var okMsg = '输入正确';  $parent.append('<span class="formtips onSuccess">'+okMsg+'</span>'); } } });

// 提交按钮 $('#send').click(function(){ $('form .required:input').trigger('blur'); var numError = $('form .onError').length; if(numError){  return false; } alert("注册成功"); });