错
<SELECT NAME="aa" side="10" onchange="onchange1(this,"UserName1)">
引号有错误
var bbb= UserName1.value;
获取不到被选中的值
<html>
<head>
<title>hello </title>
<body>
<SELECT NAME="aa" side="10" onchange="onchange1(this,'UserName1')">
<OPTION VALUE="0" checked>
<OPTION VALUE="1">liu1
<OPTION VALUE="2">liu2
<OPTION VALUE="3">liu3
</SELECT>
<input type=radio name=UserName1 value="0" checked>liu
<input type=radio name=UserName1 value="1">liu1 </body>
</head>
</html>
<script> function onchange1(aa,UserName1)
{
var aaa= aa.value; var bbb;for(var i = 0;i<document.getElementsByName(UserName1).length;i++)
{
if(document.getElementsByName(UserName1)[i].checked)
bbb= document.getElementsByName(UserName1)[i].value;
} if(bbb==0){
alert("hello1");
}
if(aaa==0){
alert("hello2");
}
else
alert("you are welcome");
}
</script>
<SELECT NAME="aa" side="10" onchange="onchange1(this,"UserName1)">
引号有错误
var bbb= UserName1.value;
获取不到被选中的值
<html>
<head>
<title>hello </title>
<body>
<SELECT NAME="aa" side="10" onchange="onchange1(this,'UserName1')">
<OPTION VALUE="0" checked>
<OPTION VALUE="1">liu1
<OPTION VALUE="2">liu2
<OPTION VALUE="3">liu3
</SELECT>
<input type=radio name=UserName1 value="0" checked>liu
<input type=radio name=UserName1 value="1">liu1 </body>
</head>
</html>
<script> function onchange1(aa,UserName1)
{
var aaa= aa.value; var bbb;for(var i = 0;i<document.getElementsByName(UserName1).length;i++)
{
if(document.getElementsByName(UserName1)[i].checked)
bbb= document.getElementsByName(UserName1)[i].value;
} if(bbb==0){
alert("hello1");
}
if(aaa==0){
alert("hello2");
}
else
alert("you are welcome");
}
</script>
解决方案 »
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