<body>
<input type=button value=Ak47 name=Ak47 onclick=go2() style="display:none">
<input type=button value=M16 name=M16 onclick=go2() style="display:">
<script language=javascript>
function go2()
{
if(M16.style.display=='')
{
Ak47.style.display=""
M16.style.display="none"
}
else{
Ak47.style.display="none"
M16.style.display=""
}
}
</script>
</body>
</html>