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<%@ Page Language="C#" AutoEventWireup="true" CodeBehind="WebForm1.aspx.cs" Inherits="testjavascript.WebForm1" %>
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml" >
<head><title></title>
<style type="text/css">
.buttonBorder{ border:1px solid red;}
</style>
</head>
<body>
<form id="form1" runat="server">
<input type="button" value="button1" onclick="changeColor(this)"/>
<input type="button" value="button2" onclick="changeColor(this)"/>
<input type="button" value="button3" onclick="changeColor(this)"/>
<input type="button" value="button4" onclick="changeColor(this)"/>
<input type="button" value="button5" onclick="changeColor(this)"/>
</form>
<script type="text/javascript">
function changeColor(obj)
{
var inputs=document.getElementById("form1").getElementsByTagName("input");
for(var i=0;i<inputs.length;i++)
{
if(inputs[i].type=="button")
{
inputs[i].style.borderColor="";
}
}
obj.style.borderColor="red";
}
</script>
</body>
</html>