<!DOCTYPE HTML>
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
<title>prompt</title>
<script type="text/javascript">
function rec(){
var score; //score变量，用来存储用户输入的成绩值。
var z = "爪儿网"
var r = "zhuaer.com"
score = prompt("请给爪儿打个分：") ;
if(score>=90)
{
document.write(z + "你很棒!" + r);
}
else if(score>=75)
{
document.write(z + "不错吆!" + r);
}
else if(score>=60)
{
document.write(r + "要加油!" + r);
}
else
{
document.write(z +"要努力了!" + r);
}
}
</script>
</head>
<body>
<input name="button" type="button" onClick="rec()" value="点击我，对成绩做评价!" />
</body>
</html>
