复选框与文本框传值有关问题
日期：2014-05-16 浏览次数：20346 次
复选框与文本框传值问题
复选框模式如下(动态循环生成，可能有多个，也可能一个都没有)：
<td> <input type= "checkbox " value= "A " name= "seName "/> </td>
<td> <input type= "checkbox " value= "B " name= "seName "/> </td>
<td> <input type= "checkbox " value= "C " name= "seName "/> </td>
........................................................
文本框模式如下：
<td> <textarea name= "wbnr " rows= "3 "> </textarea> </td>
需要实现如下操作：
选一个，向文本框中加入一个值，中间以逗号隔开（如：Ａ,Ｂ,Ｃ）；
不选，如已经累加，则自动减去（如：Ｂ不选，则上面变为：A,C）；
望各位指教！
------解决方案--------------------
Easy, L@_@K
<!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>
<title> dhtml.checkbox.dynamicShowResult.html </title>
<meta name= "generator " content= "editplus " />
<meta name= "author " content= "yixianggao@126.com " />
<meta name= "keywords " content= "javascript " />
<meta name= "description " content= "for javascript of csdn region " />
</head>
<body>
<table>
<tr>
<td> <input type= "checkbox " value= "A " name= "seName " /> A </td>
<td> <input type= "checkbox " value= "B " name= "seName " /> B </td>
<td> <input type= "checkbox " value= "C " name= "seName " /> C </td>
<td> <textarea id= "wbnr " rows= "3 "> </textarea> </td>
</tr>
</table>
<script type= "text/javascript ">
<!--
function getCheckBoxListByName(strName)
{
var colInput = document.getElementsByTagName( "input ");
var colChkList = new Object;
colChkList.length = 0;
for (var i=0; i <colInput.length; i++)
{
if (colInput[i].type.toLowerCase()== "checkbox "
&& colInput[i].name==strName)
{
colChkList[colChkList.length] = colInput[i];
colChkList.length += 1;
}
}
return colChkList;
}
var oResult = document.getElementById( "wbnr ");
var colChkList = getCheckBoxListByName( "seName ");
for (var i=0; i <colChkList.length; i++)
{
colChkList[i].onclick = function() {
oResult.value = " ";
var arrResult = new Array();
for (var j=0; j <colChkList.length; j++)
{
if (colChkList[j].checked)
{
arrResult[arrResult.length] = colChkList[j].value;
}
}
oResult.value = arrResult.join( ", ");
}
}
//-->
</script>
</body>
</html>
------解决方案--------------------
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.0 Transitional//EN ">
<HTML>
<HEAD>
<TITLE>
复选框模式如下(动态循环生成，可能有多个，也可能一个都没有)：
<td> <input type= "checkbox " value= "A " name= "seName "/> </td>
<td> <input type= "checkbox " value= "B " name= "seName "/> </td>
<td> <input type= "checkbox " value= "C " name= "seName "/> </td>
........................................................
文本框模式如下：
<td> <textarea name= "wbnr " rows= "3 "> </textarea> </td>
需要实现如下操作：
选一个，向文本框中加入一个值，中间以逗号隔开（如：Ａ,Ｂ,Ｃ）；
不选，如已经累加，则自动减去（如：Ｂ不选，则上面变为：A,C）；
望各位指教！
------解决方案--------------------
Easy, L@_@K
<!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>
<title> dhtml.checkbox.dynamicShowResult.html </title>
<meta name= "generator " content= "editplus " />
<meta name= "author " content= "yixianggao@126.com " />
<meta name= "keywords " content= "javascript " />
<meta name= "description " content= "for javascript of csdn region " />
</head>
<body>
<table>
<tr>
<td> <input type= "checkbox " value= "A " name= "seName " /> A </td>
<td> <input type= "checkbox " value= "B " name= "seName " /> B </td>
<td> <input type= "checkbox " value= "C " name= "seName " /> C </td>
<td> <textarea id= "wbnr " rows= "3 "> </textarea> </td>
</tr>
</table>
<script type= "text/javascript ">
<!--
function getCheckBoxListByName(strName)
{
var colInput = document.getElementsByTagName( "input ");
var colChkList = new Object;
colChkList.length = 0;
for (var i=0; i <colInput.length; i++)
{
if (colInput[i].type.toLowerCase()== "checkbox "
&& colInput[i].name==strName)
{
colChkList[colChkList.length] = colInput[i];
colChkList.length += 1;
}
}
return colChkList;
}
var oResult = document.getElementById( "wbnr ");
var colChkList = getCheckBoxListByName( "seName ");
for (var i=0; i <colChkList.length; i++)
{
colChkList[i].onclick = function() {
oResult.value = " ";
var arrResult = new Array();
for (var j=0; j <colChkList.length; j++)
{
if (colChkList[j].checked)
{
arrResult[arrResult.length] = colChkList[j].value;
}
}
oResult.value = arrResult.join( ", ");
}
}
//-->
</script>
</body>
</html>
------解决方案--------------------
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.0 Transitional//EN ">
<HTML>
<HEAD>
<TITLE>
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