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<html>
<head>
...
<script language="javascript">
function getStr(){
var str = '';
$('.a').each(function(){
str+= $(this).val();
});
$("#nameA").val(str);
}
</script>
</head>
<body>
<input type="hidden" id="nameA" /><br />
<input type="text" id="name1" class='a'/><br />
<input type="text" id="name2" class='a'/><br />
<input type="button" value="getStr" onclick="getStr()">
</body>
</html>
<html>
<head>
<script language="javascript">
function getStr(){
var name1 = document.getElementById("name1").value;
var name2 = document.getElementById("name2").value;
var str = name1 + name2;
document.getElementById("nameA").value = str;
}
</script>
</head>
<body>
<input type="hidden" id="nameA" /><br />
<input type="text" id="name1" /><br />
<input type="text" id="name2" onblur="getStr();" /><br />
</body>
</html>
<html>
<head>
...
<script language="javascript">
function getStr(){
var name1 = $("#name1").val();
var name2 = $("#name2").val();
var str = name1 + name2;
$("#nameA").val(str);
}
</script>
</head>
<body>
<input type="hidden" id="nameA" /><br />
<input type="text" id="name1" /><br />
<input type="text" id="name2" /><br />
<input type="button" value="getStr" onclick="getStr()">
</body>
</html>