1.警告框
<html>
<head>
<script type="text/javascript">
function disp_alert()
{
alert("我是警告框！！")
}
</script>
</head>
<body>
<input type="button"onclick="disp_alert()"value="显示警告框"/>
</body>
</html>
2.确定取消框
<html>
<head>
<script type="text/javascript">
function disp_confirm()
{
var r=confirm("按下按钮")
if (r==true)
{
document.write("您按了确认！")
}
else
{
document.write("您按了取消！")
}
}
</script>
</head>
<body>
<input type="button"onclick="disp_confirm()"value="显示确认框"/>
</body>
</html>
3.有输入的框
<html>
<head>
<script type="text/javascript">
function disp_prompt()
{
var name=prompt("请输入您的名字","Bill Gates")
if (name!=null && name!="")
{
document.write("你好！"+ name + " 今天过得怎么样？")
}
}
</script>
</head>
<body>
<input type="button"onclick="disp_prompt()"value="显示提示框"/>
</body>
</html>