<html>
<head>
<title>多条件的选取（if）</title>
</head>
<body>
<script language="javascript">
<!--
score = prompt("请输入您的成绩:");
document.write("你的成绩为:",score,"<br>");
if(score < 0 || score > 100){
document.write("你的超出了0~100的范围!")
}
if(score >= 0 && score <= 100 ){
document.write("您的成绩在0~100范围内！")
}
//-->
</script>
</body>
</html>