<!doctype html>
<html>
<head>
<meta charset="UTF-8" />
<title>九九乘法表</title>
<style type="text/css">
body{font-size: 12px;font-family: "微软雅黑";color: #666;}
table{margin-top: 50px;}
table td{border:1px solid #ccc;font-size: 14px;padding: 5px;}
table td:hover{background:#141414;color:#fff;cursor: pointer;}
h1{text-align: center;height: 50px;}
.control{width: 300px;height: 30px;position: absolute;top: 50px;right: 20px;}
#number{height: 20px;outline: none;}
#btn{width:60px;height:26px;border:0;border-radius: 0 3px 3px 0;outline: none;cursor: pointer;}
</style>
</head>
<body>
<h1>非常有趣的九九乘法表</h1>
<div>
<input type="text" id="number"/><input type="button" onclick="change(this)" value="更换" id="btn"/>
</div>
<hr/>
<div id="box"></div>
<script type="text/javascript">
gb_changfabiao(9);
//循环打印乘法表
function gb_changfabiao(number){
var html = "<table>";
for(var i = 1; i <= number; i++){
html += "<tr>";
for(var j = 1; j <=i; j++){
html += "<td>" + j + "*" + i + "=" + (i*j) + "</td>";
}
html += "</tr>";
}
html += "</table>";
document.getElementById("box").innerHTML = html;
}
//获取number
function change(obj){
var number = document.getElementById("number").value;
if(number == ""|| number <= 0 || isNaN(number)){
return gb_changfabiao(9);
}
gb_changfabiao(number);
}
//回车确认
document.onkeydown = function(e){
if(!e) e = window.event;
if((e.keyCode || e.which) == 13){
document.getElementById("btn").click();
}
}
</script>
</body>
</html>