在客户端用java-script产生5个Hello的消息框

<script language = "javascript">
function test()
{
var i;
for(i = 1; i <= 5; i++)
alert("Hello");
}
</script>
<input type = "button" onClick ="test()" value = "test">

<script language ="javascript">
alert("hello");
alert("hello");
alert("hello");
alert("hello");
alert("hello");
</script>

<script language ="javascript">
var i=0;
while (i<5)
{
alert("hello");
i+=1;
}
</script>