单选按钮列表获取未定义的错误 [英] radio button list getting an error as undefined
问题描述
函数maxlen()
{
var radioButtons = document.getElementsByName(rbtnPloicyType);
for(var x = 0; x< radioButtons.length; x ++){
if(radioButtons [x ] .checked){
var selectedvalue = radioButtons [x] .value;
}
}
}
< asp:TextBox ID =txtRegistrationNorunat =serverMaxLength = 100CssClass =textfieldWidth =200pxonchange =return RegistrationRTO(this)önblur=return maxlen(this);>
Regadrs,
rahul。
可能你只是错误地写东西。 :-)这样,您可能会错误输入名称,就像您在问题中输入错误内容一样,并且document.getElementsByName
的结果可能会返回未定义的值,这表示没找到的条件。请检查。如果可能,请使用Javascript调试器。
-SA
Hi
试试像这样..
< script type = text / javascript >
function maxlen() {
var rb = document.getElementById(<% = rbtnPloicyType.ClientID %> );
var inputs = rb.getElementsByTagName('input');
var flag = false;选择
var;
for(var i = 0; i < inputs.length; i ++) {
if (inputs [i] .checked) {
已选择 = inputs [i];
flag = true;
break;
}
< span class =code-attribute>
}
if (flag)
alert(selected.value);
}
< / script >
Hi,
function maxlen()
{
var radioButtons = document.getElementsByName("rbtnPloicyType");
for (var x = 0; x < radioButtons.length; x++) {
if (radioButtons[x].checked) {
var selectedvalue = radioButtons[x].value;
}
}
}
<asp:TextBox ID="txtRegistrationNo" runat="server" MaxLength="100" CssClass="textfield" Width="200px" onchange="return RegistrationRTO(this)" önblur="return maxlen(this);">
Regadrs,
rahul.
Probably you just tend to mistype things. :-) This way, you could mistype the name, exactly as you mistype things in your question, and than the result ofdocument.getElementsByName
could return undefined value, which indicates the "not found" condition. Please check. If possible, use a Javascript debuggers.
—SA
Hi Try like this..
<script type="text/javascript"> function maxlen() { var rb = document.getElementById("<%=rbtnPloicyType.ClientID%>"); var inputs = rb.getElementsByTagName('input'); var flag = false; var selected; for (var i = 0; i < inputs.length; i++) { if (inputs[i].checked) { selected = inputs[i]; flag = true; break; } } if (flag) alert(selected.value); } </script>
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