有这样一个问题:
当记录多条(两条以上)时,能记录所选的checkbox<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=gb2312">
<title>Untitled Document</title>
<script>
var mailSelect = "";
function addMail()
{
var mailArray=new Array();
var mailObjects=document.all.mailObj;//var mailObjects=document.getElementsByName("mailObj");
alert(mailObjects.length);
for(var i=0;i<mailObjects.length;i++){if(mailObjects[i].checked ){
mailArray[mailArray.length]=mailObjects[i].value;
}
}
document.all.mailList.value=mailArray.join(",");
}
</script>
</head><body>
<center>
<table width="136" border="1" cellspacing="0" cellpadding="0">
<tr>
<td><input type="checkbox" name="mailObj" value="[email protected]" onClick="addMail();"></td>
<td id="mail">[email protected]</td>
</tr>
<tr>
<td><input type="checkbox" name="mailObj" value="[email protected]" onClick="addMail();"></td>
<td id="mail">[email protected]</td>
</tr></table>
<br/>
<input type="text" size="50" maxlength="50" name="mailList">
</center>
</body>
</html>
但,当记录只有一条时 ,就不能记录了:
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=gb2312">
<title>Untitled Document</title>
<script>
var mailSelect = "";
function addMail()
{
var mailArray=new Array();
var mailObjects=document.all.mailObj;//var mailObjects=document.getElementsByName("mailObj");
alert(mailObjects.length);
for(var i=0;i<mailObjects.length;i++){if(mailObjects[i].checked ){
mailArray[mailArray.length]=mailObjects[i].value;
}
}
document.all.mailList.value=mailArray.join(",");
}
</script>
</head><body>
<center>
<table width="136" border="1" cellspacing="0" cellpadding="0">
<tr>
<td><input type="checkbox" name="mailObj" value="[email protected]" onClick="addMail();"></td>
<td id="mail">[email protected]</td>
</tr>
</table>
<br/>
<input type="text" size="50" maxlength="50" name="mailList">
</center>
</body>
</html>
请解决!
当记录多条(两条以上)时,能记录所选的checkbox<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=gb2312">
<title>Untitled Document</title>
<script>
var mailSelect = "";
function addMail()
{
var mailArray=new Array();
var mailObjects=document.all.mailObj;//var mailObjects=document.getElementsByName("mailObj");
alert(mailObjects.length);
for(var i=0;i<mailObjects.length;i++){if(mailObjects[i].checked ){
mailArray[mailArray.length]=mailObjects[i].value;
}
}
document.all.mailList.value=mailArray.join(",");
}
</script>
</head><body>
<center>
<table width="136" border="1" cellspacing="0" cellpadding="0">
<tr>
<td><input type="checkbox" name="mailObj" value="[email protected]" onClick="addMail();"></td>
<td id="mail">[email protected]</td>
</tr>
<tr>
<td><input type="checkbox" name="mailObj" value="[email protected]" onClick="addMail();"></td>
<td id="mail">[email protected]</td>
</tr></table>
<br/>
<input type="text" size="50" maxlength="50" name="mailList">
</center>
</body>
</html>
但,当记录只有一条时 ,就不能记录了:
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=gb2312">
<title>Untitled Document</title>
<script>
var mailSelect = "";
function addMail()
{
var mailArray=new Array();
var mailObjects=document.all.mailObj;//var mailObjects=document.getElementsByName("mailObj");
alert(mailObjects.length);
for(var i=0;i<mailObjects.length;i++){if(mailObjects[i].checked ){
mailArray[mailArray.length]=mailObjects[i].value;
}
}
document.all.mailList.value=mailArray.join(",");
}
</script>
</head><body>
<center>
<table width="136" border="1" cellspacing="0" cellpadding="0">
<tr>
<td><input type="checkbox" name="mailObj" value="[email protected]" onClick="addMail();"></td>
<td id="mail">[email protected]</td>
</tr>
</table>
<br/>
<input type="text" size="50" maxlength="50" name="mailList">
</center>
</body>
</html>
请解决!
var mailObjects=document.getElementsByName("mailObj");
<head>
<meta http-equiv="Content-Type" content="text/html; charset=gb2312">
<title>Untitled Document</title>
<script>
var mailSelect = "";
function addMail()
{
var mailArray=new Array();
var mailObjects=document.getElementById('mailObj');//var mailObjects=document.getElementsByName("mailObj");
if(mailObjects)
{
// 如果只有一个对象,则length为null,执行else
if(mailObjects.length)
{
alert(mailObjects.length);
for(var i=0;i<mailObjects.length;i++){
if(mailObjects[i].checked ){
mailArray[mailArray.length]=mailObjects[i].value;
}
}
}else
{
//一个对象,则直接取值就可以了~
mailArray[mailArray.length]=mailObjects.value;
}
}
document.all.mailList.value=mailArray.join(",");}
</script>
</head><body>
<center>
<table width="136" border="1" cellspacing="0" cellpadding="0">
<tr>
<td><input type="checkbox" name="mailObj" value="[email protected]" onClick="addMail();"></td>
<td id="mail">[email protected]</td>
</tr>
</table>
<br/>
<input type="text" size="50" maxlength="50" name="mailList">
</center>
</body>
</html>
如下~
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=gb2312">
<title>Untitled Document</title>
<script>
var mailSelect = "";
function addMail()
{
var mailArray=new Array();
var mailObjects=document.all('mailObj');//var mailObjects=document.getElementsByName("mailObj");
if(mailObjects)
{
if(mailObjects.length)
{
alert(mailObjects.length);
for(var i=0;i<mailObjects.length;i++){ if(mailObjects[i].checked ){
mailArray[mailArray.length]=mailObjects[i].value;
}
}
}else
{
mailArray[mailArray.length]=mailObjects.value;
}
}
document.all.mailList.value=mailArray.join(",");}
</script>
</head><body>
<center>
<table width="136" border="1" cellspacing="0" cellpadding="0">
<tr>
<td>
<input type="checkbox" id="mailObj" value="[email protected]" onClick="addMail();">
<input type="checkbox" id="mailObj" value="[email protected]" onClick="addMail();">
</td>
<td id="mail">[email protected]</td>
</tr>
</table>
<br/>
<input type="text" size="50" maxlength="50" name="mailList">
</center>
</body>
</html>