javaScript 全选 反选案例
2014-01-29 19:17
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<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN"> <html> <head> <title>check.html</title> <meta http-equiv="content-type" content="text/html; charset=UTF-8"> </head> <body> 您的爱好很广泛!!! <br> <input type="checkbox" name="checkItems" id="checkItems" value="全选/全不选"/>全选/全不选 <br> <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="游泳"/>游泳 <input type="checkbox" name="items" value="唱歌"/>唱歌 <br> <input type="button" name="checkall" id="checkall" value="全选" /> <input type="button" name="checkall" id="checkallNo" value="全不选" /> <input type="button" name="checkall" id="check_revsern" value="反选" /> </body> </html>
<script language="JavaScript"> /* * <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="游泳"/>游泳 <input type="checkbox" name="items" value="唱歌"/>唱歌 */ var itemsElements = document.getElementsByName("items"); //<input type="button" name="checkall" id="checkall" value="全选" /> document.getElementById("checkall").onclick = checkall; function checkall(){ for(var i=0;i<itemsElements.length;i++){ var itemsElement = itemsElements[i]; itemsElement.checked = "checked"; } } //<input type="button" name="checkall" id="checkallNo" value="全不选" /> document.getElementById("checkallNo").onclick = checkallNo; function checkallNo(){ for(var i=0;i<itemsElements.length;i++){ var itemsElement = itemsElements[i]; //itemsElement.removeAttribute("checked"); //itemsElement.setAttribute("checked",null); itemsElement.checked = null; /* * 编写javascript代码时: * * 不仅要语法正确,而且效果也正确 * * 只看语法的正确性,最终要看效果对不对 */ } } //<input type="button" name="checkall" id="check_revsern" value="反选" /> document.getElementById("check_revsern").onclick = function(){ for(var i=0;i<itemsElements.length;i++){ var itemsElement = itemsElements[i]; if(itemsElement.checked){ itemsElement.checked = null; }else{ itemsElement.checked = "checked"; } } } //<input type="checkbox" name="checkItems" id="checkItems" value="全选/全不选"/>全选/全不选 document.getElementById("checkItems").onclick = function(){ if(this.checked){ //全选 checkall(); }else{ //全不选 checkallNo(); } } /* * 编写代码时,总是想一次性将代码做到最优: * * 即使是三行代码,多日后,也是需要维护的 * * 代码实现上: * * 完成功能,目标 * * 做优化 */ </script>
另一个案例
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
<title>无标题文档</title>
<style type="text/css">
<!--
BODY
{
font-family:"Courier";
font-size: 12px;
margin:0px 0px 0px 0px;
overflow-x:no;
overflow-y:no;
background-color: #B8D3F4;
}
td
{
font-size:12px;
}
.default_input
{
border:1px solid #666666;
height:18px;
font-size:12px;
}
.default_input2
{
border:1px solid #666666;
height:18px;
font-size:12px;
}
.nowrite_input
{
border:1px solid #849EB5;
height:18px;
font-size:12px;
background-color:#EBEAE7;
color: #9E9A9E;
}
.default_list
{
font-size:12px;
border:1px solid #849EB5;
}
.default_textarea
{
font-size:12px;
border:1px solid #849EB5;
}
.nowrite_textarea
{
border:1px solid #849EB5;
font-size:12px;
background-color:#EBEAE7;
color: #9E9A9E;
}
.wordtd5 {
font-size: 12px;
text-align: center;
vertical-align:top;
padding-top: 6px;
padding-right: 5px;
padding-bottom: 3px;
padding-left: 5px;
background-color: #b8c4f4;
}
.wordtd {
font-size: 12px;
text-align: left;
vertical-align:top;
padding-top: 6px;
padding-right: 5px;
padding-bottom: 3px;
padding-left: 5px;
background-color: #b8c4f4;
}
.wordtd_1 {
font-size: 12px;
vertical-align:top;
padding-top: 6px;
padding-right: 5px;
padding-bottom: 3px;
padding-left: 5px;
background-color: #516CD6;
color:#fff;
}
.wordtd_2{
font-size: 12px;
text-align: right;
vertical-align:top;
padding-top: 6px;
padding-right: 5px;
padding-bottom: 3px;
padding-left: 5px;
background-color: #64BDF9;
}
.wordtd_3{
font-size: 12px;
text-align: right;
vertical-align:top;
padding-top: 6px;
padding-right: 5px;
padding-bottom: 3px;
padding-left: 5px;
background-color: #F1DD34;
}
.inputtd
{
font-size:12px;
vertical-align:top;
padding-top: 3px;
padding-right: 3px;
padding-bottom: 3px;
padding-left: 3px;
}
.inputtd2
{
text-align: center;
font-size:12px;
vertical-align:top;
padding-top: 3px;
padding-right: 3px;
padding-bottom: 3px;
padding-left: 3px;
}
.tablebg
{
font-size:12px;
}
.tb{
border-collapse: collapse;
border: 1px outset #999999;
background-color: #FFFFFF;
}
.td2{line-height:22px; text-align:center; background-color:#F6F6F6;}
.td3{background-color:#B8D3F4; text-align:center; line-height:20px;}
.td4{background-color:#F6F6F6;line-height:20px;}
.td5{border:#000000 solid;
border-right-width:0px;
border-left-width:0px;
border-top-width:0px;
border-bottom-width:1px;}
.tb td{
font-size: 12px;
border: 2px groove #ffffff;
}
.noborder {
border: none;
}
.button {
border: 1px ridge #ffffff;
line-height:18px;
height: 20px;
width: 45px;
padding-top: 0px;
background:#CBDAF7;
color:#000000;
font-size: 9pt;
font-family:"Courier";
}
.textarea {
font-family: Arial, Helvetica, sans-serif, "??";
font-size: 9pt;
color: #000000;
border-bottom-width: 1px;
border-top-style: none;
border-right-style: none;
border-bottom-style: solid;
border-left-style: none;
border-bottom-color: #000000;
background-color:transparent;
text-align: left
}
-->
</style></head>
<body>
<div style="border:1px dashed #E6E6E6;margin:150px 0px 0px 450px; width:350px; height:200px; background-color:#E6E6E6;">
<table width="285" height="169" border="0" align="left" cellpadding="0" cellspacing="0" style="margin:15px 0px 0px 15px;">
<tr>
<td width="126">
<!--multiple="multiple" 能同时选择多个 size="10" 确定下拉选的长度-->
<select name="first" multiple="multiple" size="10" class="td3" id="first">
<option value="选项1">选项1</option>
<option value="选项2">选项2</option>
<option value="选项3">选项3</option>
<option value="选项4">选项4</option>
<option value="选项5">选项5</option>
<option value="选项6">选项6</option>
<option value="选项7">选项7</option>
<option value="选项8">选项8</option>
</select>
</td>
<td width="69" valign="middle">
<input name="add" id="add" type="button" class="button" value="-->" />
<input name="add_all" id="add_all" type="button" class="button" value="==>" />
<input name="remove" id="remove" type="button" class="button" value="<--" />
<input name="remove_all" id="remove_all" type="button" class="button" value="<==" />
</td>
<td width="127" align="left">
<select name="second" size="10" multiple="multiple" class="td3" id="second">
<option value="选项9">选项9</option>
</select>
</td>
</tr>
</table>
</div>
</body>
</body>
</html>
<script type="text/javascript"> //<input name="add" id="add" type="button" class="button" value="-->" /> document.getElementById("add").onclick = add; function add(){ /* * 将左边被选中的选项,移到右边去 * * 选中一个时 * * 选中多个时 */ var firstElement = document.getElementById("first"); var options = firstElement.getElementsByTagName("option"); var secondElement = document.getElementById("second"); // for(var i=0;i<options.length;i++){ // if(options[i].selected){ // secondElement.appendChild(options[i]); // i--; // } // } var len = options.length; for(var i=0;i<len;i++){ /* * select标签的selectedIndex属性 * * 当没有选中任何一个选项时,selectedIndex属性值是"-1" * * 当选中一个选项的时候,selectedIndex属性值是被选中的选项的索引值 * * 当选中多个选项的时候,selectedIndex属性值是第一个被选中的选项的索引值 */ //alert(firstElement.selectedIndex); if(firstElement.selectedIndex!=-1){ secondElement.appendChild(options[firstElement.selectedIndex]); } } } //<input name="add_all" id="add_all" type="button" class="button" value="==>" /> document.getElementById("add_all").onclick = function(){ var firstElement = document.getElementById("first"); var options = firstElement.getElementsByTagName("option"); var len = options.length; var secondElement = document.getElementById("second"); for(var i=0;i<len;i++){ secondElement.appendChild(options[0]); } } //<input name="remove" id="remove" type="button" class="button" value="<--" /> document.getElementById("remove").onclick = remove; function remove(){ var secondElement = document.getElementById("second"); var options = secondElement.getElementsByTagName("option"); var len = options.length; var firstElement = document.getElementById("first"); for(var i=0;i<len;i++){ if(secondElement.selectedIndex!=-1){ firstElement.appendChild(options[secondElement.selectedIndex]); } } } //<input name="remove_all" id="remove_all" type="button" class="button" value="<==" /> document.getElementById("remove_all").onclick = function(){ var secondElement = document.getElementById("second"); var options = secondElement.getElementsByTagName("option"); var len = options.length; var firstElement = document.getElementById("first"); for(var i=0;i<len;i++){ firstElement.appendChild(options[0]); } } //双击事件 document.getElementById("first").ondblclick = add; document.getElementById("second").ondblclick = remove; </script>
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