用srcElement實現添加效果原創

2019-11-21 02:33:13

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<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd"> <html xmlns="http://www.w3.org/1999/xhtml"> <head> <meta http-equiv="Content-Type" content="text/html; charset=gb2312" /> <title>無標題文檔</title> <style type="text/css">  </style> <script language="javascript"> function addthis(){ var srcE=event.srcElement?event.srcElement:event.target; var thev=srcE.value; //alert(thev); var s=document.forms[0].likes.value.indexOf(thev) if(s==-1){ document.forms[0].likes.value+=thev+","; }} </script> </head> <body> <form name="form1">   <font color="#666666">   <textarea name="likes" cols="40" rows="2" id="textarea9" style="font-size: 9pt;padding:4px;"></textarea>   </font>   <table border="0" width="100%" cellspacing="0" cellpadding="0" >     <tr>       <td><input name="activity" type="checkbox" value="電腦/網絡" id="activity_1" onclick="javascript:addthis()" />           <label for="activity_1" class="l">電腦/網絡</label></td>       <td><label for="activity_2" class="l">         <input name="activity2" type="checkbox" value="電子游戲" id="activity_2" onclick="javascript:addthis()"/>         電子游戲</label></td>       <td><input name="activity2" type="checkbox" value="體育運動" id="activity_3" onclick="javascript:addthis()" />           <label for="activity_3" class="l">體育運動</label></td>       <td><input name="activity2" type="checkbox" value="飲酒" id="activity_4" />           <label for="activity_4" class="l">飲酒</label></td>       <td><input name="activity2" type="checkbox" value="品茗" id="activity_5" />           <label for="activity_5" class="l">品茗</label></td>     </tr>     <tr>       <td><input name="activity2" type="checkbox" value="彈琴" id="activity_6" />           <label for="activity_6" class="l">彈琴</label></td>       <td><input name="activity2" type="checkbox" value="看電影/電視" id="activity_7" />           <label for="activity_7" class="l">看電影/電視</label></td>       <td><input name="activity2" type="checkbox" value="下棋/打牌" id="activity_8" />           <label for="activity_8" class="l">下棋/打牌</label></td>       <td><input name="activity2" type="checkbox" value="觀光旅游" id="activity_9" />           <label for="activity_9" class="l">觀光旅游</label></td>       <td><input name="activity2" type="checkbox" value="逛街購物" id="activity_10" />           <label for="activity_10" class="l">逛街購物</label></td>     </tr>     <tr>       <td><input name="activity2" type="checkbox" value="閱讀" id="activity_11" />           <label for="activity_11" class="l">閱讀</label></td>       <td><input name="activity2" type="checkbox" value="寫作" id="activity_12" />           <label for="activity_12" class="l">寫作</label></td>       <td><input name="activity2" type="checkbox" value="烹調" id="activity_13" />           <label for="activity_13" class="l">烹調</label></td>       <td><input name="activity2" type="checkbox" value="舞會/卡拉OK" id="activity_14" />           <label for="activity_14" class="l">舞會/卡拉OK</label></td>       <td><input name="activity2" type="checkbox" value="健身/武術" id="activity_15" />           <label for="activity_15" class="l">健身/武術</label></td>     </tr>     <tr>       <td><input name="activity2" type="checkbox" value="水上活動" id="activity_16" />           <label for="activity_16" class="l">水上活動</label></td>       <td><input name="activity2" type="checkbox" value="文藝表演" id="activity_17" />           <label for="activity_17" class="l">文藝表演</label></td>       <td><input name="activity2" type="checkbox" value="18" id="activity_18" />           <label for="activity_18" class="l">聊天</label></td>       <td><input name="activity2" type="checkbox" value="19" id="activity_19" />           <label for="activity_19" class="l">家事/手工藝　</label></td>       <td><input name="activity2" type="checkbox" value="20" id="activity_20" />           <label for="activity_20" class="l">書法/繪畫</label></td>     </tr>     <tr>       <td><input name="activity2" type="checkbox" value="21" id="activity_21" />           <label for="activity_21" class="l">儲蓄/投資</label></td>       <td><input name="activity2" type="checkbox" value="22" id="activity_22" />           <label for="activity_22" class="l">養寵物</label></td>       <td><input name="activity2" type="checkbox" value="23" id="activity_23" />           <label for="activity_23" class="l">聽音樂</label></td>       <td><input name="activity2" type="checkbox" value="24" id="activity_24" />           <label for="activity_24" class="l">各種收集活動　</label></td>       <td><input name="activity2" type="checkbox" value="25" id="activity_25" />           <label for="activity_25" class="l">攝影/藝術創作</label></td>     </tr>   </table> </form> </body> </html>

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2006-08-21可以自己檢測，不要每個checkbox加事件,刪除功能沒有實現

<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">  <html xmlns="http://www.w3.org/1999/xhtml">  <head>  <meta http-equiv="Content-Type" content="text/html; charset=gb2312" />  <title>無標題文檔</title>  <style type="text/css">    </style>  <script language="javascript">  function addthis(){  var srcE=event.srcElement?event.srcElement:event.target; if((srcE.tagName=="INPUT")&&(srcE.type.toLowerCase()=="checkbox")){ var thev=srcE.value; var theid=srcE.id; //alert(theid); if(theid.indexOf('xinge')!=-1){ thetag="xinge"; }else{ thetag="likes"; } //alert(thetag); switch(thetag){ case "likes": var s=document.forms[0].likes.value.indexOf(thev); if(s==-1){  document.forms[0].likes.value+=thev+",";  } break; case "xinge": var s=document.forms[0].xinge.value.indexOf(thev); if(s==-1){  document.forms[0].xinge.value+=thev+",";  } break; } }} document.onmousedown=addthis; </script>  </head>  <body>  <form name="form1"><textarea name="likes" cols="40" rows="8" id="textarea9" style="font-size: 9pt;padding:4px;"></textarea>  <textarea name="xinge" cols="40" rows="8" id="textarea9" style="font-size: 9pt;padding:4px;"></textarea>   <table border="0" width="100%" cellspacing="0" cellpadding="0" >      <tr>       <td colspan="5">興趣愛好</td>     </tr>     <tr>        <td><input name="activity" type="checkbox" value="電腦/網絡" id="activity_1" />            <label for="activity_1" class="l">電腦/網絡</label></td>        <td><label for="activity_2" class="l">          <input name="activity2" type="checkbox" value="電子游戲" id="activity_2"/>          電子游戲</label></td>        <td><input name="activity2" type="checkbox" value="體育運動" id="activity_3" />            <label for="activity_3" class="l">體育運動</label></td>        <td><input name="activity2" type="checkbox" value="飲酒" id="activity_4" />            <label for="activity_4" class="l">飲酒</label></td>        <td><input name="activity2" type="checkbox" value="品茗" id="activity_5" />            <label for="activity_5" class="l">品茗</label></td>      </tr>      <tr>        <td><input name="activity2" type="checkbox" value="彈琴" id="activity_6" />            <label for="activity_6" class="l">彈琴</label></td>        <td><input name="activity2" type="checkbox" value="看電影/電視" id="activity_7" />            <label for="activity_7" class="l">看電影/電視</label></td>        <td><input name="activity2" type="checkbox" value="下棋/打牌" id="activity_8" />            <label for="activity_8" class="l">下棋/打牌</label></td>        <td><input name="activity2" type="checkbox" value="觀光旅游" id="activity_9" />            <label for="activity_9" class="l">觀光旅游</label></td>        <td><input name="activity2" type="checkbox" value="逛街購物" id="activity_10" />            <label for="activity_10" class="l">逛街購物</label></td>      </tr>      <tr>        <td><input name="activity2" type="checkbox" value="閱讀" id="activity_11" />            <label for="activity_11" class="l">閱讀</label></td>        <td><input name="activity2" type="checkbox" value="寫作" id="activity_12" />            <label for="activity_12" class="l">寫作</label></td>        <td><input name="activity2" type="checkbox" value="烹調" id="activity_13" />            <label for="activity_13" class="l">烹調</label></td>        <td><input name="activity2" type="checkbox" value="舞會/卡拉OK" id="activity_14" />            <label for="activity_14" class="l">舞會/卡拉OK</label></td>        <td><input name="activity2" type="checkbox" value="健身/武術" id="activity_15" />            <label for="activity_15" class="l">健身/武術</label></td>      </tr>      <tr>       <td colspan="5">性格：</td>     </tr>     <tr>        <td><input name="activity2" type="checkbox" value="活潑" id="xinge_16" />            <label for="xinge_16" class="l">活潑</label></td>        <td><input name="activity2" type="checkbox" value="尖刻" id="xinge_17" />            <label for="xinge_17" class="l">尖刻</label></td>        <td><input name="activity2" type="checkbox" value="自閉" id="xinge_18" />            <label for="xinge_18" class="l">自閉</label></td>        <td><input name="activity2" type="checkbox" value="等等" id="xinge_19" />            <label for="xinge_19" class="l">等等　</label></td>        <td><input name="activity2" type="checkbox" value="外向" id="xinge_20" />            <label for="xinge_20" class="l">外向</label></td>      </tr>    </table>  </form>  </body>  </html>

[Ctrl+A 全選注:如需引入外部Js需刷新才能執行]

blueidea斑竹回復，推薦

<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">   <html xmlns="http://www.w3.org/1999/xhtml">   <head>   <meta http-equiv="Content-Type" content="text/html; charset=gb2312" />   <title>無標題文檔</title>   <style type="text/css">      </style>   <script language="javascript">   var likes=new Array(); xinge=new Array(); function addthis(e){   var e, srcE, op, opt, i;   e=window.event?window.event:e;   srcE=e.srcElement?e.srcElement:e.target;   if(!srcE)return;   if(String(srcE.tagName).toLowerCase()!="input"||String(srcE.type).toLowerCase()!="checkbox")return;   if(srcE.id.indexOf("xinge")!=-1){ op=xinge; opt=document.forms[0].xinge }else{ op=likes; opt=document.forms[0].likes; }   if(srcE.checked){     i=-1;     while(op[++i])if(op[i]==srcE.value)return;     op[i]=srcE.value;   }else{     i=-1;     while(op[++i])if(op[i]==srcE.value){op.splice(i,1);i--;}   }   opt.value=op; }  document.onkeydown=document.onchange=document.onclick=addthis;  </script>   </head>   <body>   <form name="form1"><textarea name="likes" cols="40" rows="8" id="textarea9" style="font-size: 9pt;padding:4px;"></textarea>   <textarea name="xinge" cols="40" rows="8" id="textarea9" style="font-size: 9pt;padding:4px;"></textarea>    <table border="0" width="100%" cellspacing="0" cellpadding="0" >       <tr>        <td colspan="5">興趣愛好</td>      </tr>      <tr>         <td><input name="activity" type="checkbox" value="電腦/網絡" id="activity_1" />             <label for="activity_1" class="l">電腦/網絡</label></td>         <td><label for="activity_2" class="l">           <input name="activity2" type="checkbox" value="電子游戲" id="activity_2"/>           電子游戲</label></td>         <td><input name="activity2" type="checkbox" value="體育運動" id="activity_3" />             <label for="activity_3" class="l">體育運動</label></td>         <td><input name="activity2" type="checkbox" value="飲酒" id="activity_4" />             <label for="activity_4" class="l">飲酒</label></td>         <td><input name="activity2" type="checkbox" value="品茗" id="activity_5" />             <label for="activity_5" class="l">品茗</label></td>       </tr>       <tr>         <td><input name="activity2" type="checkbox" value="彈琴" id="activity_6" />             <label for="activity_6" class="l">彈琴</label></td>         <td><input name="activity2" type="checkbox" value="看電影/電視" id="activity_7" />             <label for="activity_7" class="l">看電影/電視</label></td>         <td><input name="activity2" type="checkbox" value="下棋/打牌" id="activity_8" />             <label for="activity_8" class="l">下棋/打牌</label></td>         <td><input name="activity2" type="checkbox" value="觀光旅游" id="activity_9" />             <label for="activity_9" class="l">觀光旅游</label></td>         <td><input name="activity2" type="checkbox" value="逛街購物" id="activity_10" />             <label for="activity_10" class="l">逛街購物</label></td>       </tr>       <tr>         <td><input name="activity2" type="checkbox" value="閱讀" id="activity_11" />             <label for="activity_11" class="l">閱讀</label></td>         <td><input name="activity2" type="checkbox" value="寫作" id="activity_12" />             <label for="activity_12" class="l">寫作</label></td>         <td><input name="activity2" type="checkbox" value="烹調" id="activity_13" />             <label for="activity_13" class="l">烹調</label></td>         <td><input name="activity2" type="checkbox" value="舞會/卡拉OK" id="activity_14" />             <label for="activity_14" class="l">舞會/卡拉OK</label></td>         <td><input name="activity2" type="checkbox" value="健身/武術" id="activity_15" />             <label for="activity_15" class="l">健身/武術</label></td>       </tr>       <tr>        <td colspan="5">性格：</td>      </tr>      <tr>         <td><input name="activity2" type="checkbox" value="活潑" id="xinge_16" />             <label for="xinge_16" class="l">活潑</label></td>         <td><input name="activity2" type="checkbox" value="尖刻" id="xinge_17" />             <label for="xinge_17" class="l">尖刻</label></td>         <td><input name="activity2" type="checkbox" value="自閉" id="xinge_18" />             <label for="xinge_18" class="l">自閉</label></td>         <td><input name="activity2" type="checkbox" value="等等" id="xinge_19" />             <label for="xinge_19" class="l">等等　</label></td>         <td><input name="activity2" type="checkbox" value="外向" id="xinge_20" />             <label for="xinge_20" class="l">外向</label></td>       </tr>     </table>   </form>   </body>   </html>

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splice 方法
從一個數組中移除一個或多個元素，如果必要，在所移除元素的位置上插入新元素，返回所移除的元素。
arrayObj.splice(start, deleteCount, [item1[, item2[, . . . [,itemN]]]])

參數
arrayObj 必選項。一個 Array 對象。

start

必選項。指定從數組中移除元素的開始位置，這個位置是從 0 開始計算的。

deleteCount

必選項。要移除的元素的個數。

item1, item2,. . .,itemN

必選項。要在所移除元素的位置上插入的新元素。

說明
splice 方法可以移除從 start 位置開始的指定個數的元素并插入新元素，從而修改 arrayObj。返回值是一個由所移除的元素組成的新 Array 對象。

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