<!Doctype html>
<html>
<head>
<title>循环实例</title>
<style type="text/css">
#date{
width:100px;
height:300px;
margin:0 auto;
background:orange;
line-height:22px
}
</style>
<script type="text/javascript">
var n = parseInt(window.prompt("请输入N个数",1));
var i = 1;
var max = parseInt(prompt("请输入第"+i+"数",1));
var num;
while (i < n){
i=i+1;
num=parseInt(prompt("请输入第"+i+"数",1));
if (num > max){
max=num;
}
}
document.write("<div ID='date'>"+max+"</div>");
</script>
<script type="text/javascript">
var num=parseInt(prompt("请输入数",1));
var result;
var flag ;
for(var i=2 ;i<num;i++){
if (num % i==0 ){
flag=true;
break;
}else{
flag=false;
};
};
if(flag){
result="不是质数"
}else{
result="是质数"
};
document.write("<div>"+result+"</div>")
</script>
</head>
<body>
</body>
</html>
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