<form name="form" method="post" action="" onsubmit="return CheckForm(this)">
<input type="radio" name="fnid" value="" checked>
<input type="radio" name="fnid" value="2">
<input type="radio" name="fnid" value="3">
<input type="radio" name="fnid" value="4">
<input type="radio" name="fnid" value="5">
<input type="radio" name="fnid" value="6">
<input type="radio" name="fnid" value="7">
<input type="radio" name="fnid" value="8">
<input type="submit" name="Submit" value="提交">
</form>
<script language="JavaScript">
function CheckForm(theForm) {
var flag=false;
for(i=0;i<theForm.fnid.length;i++) {
if(theForm.fnid[i].checked&&theForm.fnid[i].value=="") {
flag=true;
break;
}
}
if(flag) {
alert("请选择分类");
return false;
} else {
return true;
}
}
</script>
<input type="radio" name="fnid" value="" checked>
<input type="radio" name="fnid" value="2">
<input type="radio" name="fnid" value="3">
<input type="radio" name="fnid" value="4">
<input type="radio" name="fnid" value="5">
<input type="radio" name="fnid" value="6">
<input type="radio" name="fnid" value="7">
<input type="radio" name="fnid" value="8">
<input type="submit" name="Submit" value="提交">
</form>
<script language="JavaScript">
function CheckForm(theForm) {
var flag=false;
for(i=0;i<theForm.fnid.length;i++) {
if(theForm.fnid[i].checked&&theForm.fnid[i].value=="") {
flag=true;
break;
}
}
if(flag) {
alert("请选择分类");
return false;
} else {
return true;
}
}
</script>
<html>
<head>
<script language="JavaScript">
<!--
function CheckForm(theForm)
{
if(theForm.fnid[0].checked)
{
alert("请选择分类");
return false;
}
return true;
}
// -->
</script></head><body>
<form name="form" method="post" action="" onsubmit="return CheckForm(this)">
<input type="radio" name="fnid" value="" checked>
<input type="radio" name="fnid" value="2">
<input type="radio" name="fnid" value="3">
<input type="radio" name="fnid" value="4">
<input type="radio" name="fnid" value="5">
<input type="radio" name="fnid" value="6">
<input type="radio" name="fnid" value="7">
<input type="radio" name="fnid" value="8">
<input type="submit" name="Submit" value="提交">
</form>
</body>
</html>
如下:
<script language="JavaScript">
<!--
function CheckForm(theForm)
{
var flag=true;
if(form.fnid[0].status==true)//或用if(theForm.fnid[0].value)
{
flag=false;
}if(flag==false){alert("请选择分类"); return false;}
return true;
}
// -->
</script>
如下:function CheckForm(theForm)
{
var flag=true;
if(form.fnid[0].status==true)//或用if(theForm.fnid[0].value)
{
flag=false;
}if(flag==false){alert("请选择分类"); return false;}
return true;
}
{
var flag=true;
if(form.fnid[0].status==true)//或用if(theForm.fnid[0].checked)
{
flag=false;
}if(flag==false){alert("请选择分类"); return false;}
return true;
}
var flag=false;
for(i=0;i<theForm.fnid.length;i++) {
if(theForm.fnid[i].checked&&theForm.fnid[i].value==""&&flag==false) {
flag=true;
}
}
if(flag) {
alert("请选择分类");
return false;
} else {
return true;
}
}