<script src="jquery.min.js"></script>
<script>
$(function(){
$("#user").blur(function(){
$.get("ajax.asp",
{user:$("#user").val(),comment:$("#comment").val()},
function(data){
$("#target").html(data)
}
)
})
})
</script>
<p>
<label for="textfield"></label>
<input type="text" name="textfield" id="user" />
</p>
<p>
<label for="textarea"></label>
<textarea name="textarea" id="comment" cols="45" rows="5"></textarea>
</p>
<p>
<input type="submit" name="button" id="button" value="提交"/>
</p>
<div id="target"></div>