<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
<title>累加按钮，自加1</title>
<style>
body{text-align:center;}
input{font:12px arial;cursor:pointer;padding:0 10px;}
</style>
<script type="text/javascript">
window.onload = function ()
{
var aBtn = document.getElementsByTagName("input")[0];
var i = 0;
aBtn.onclick = function ()
{
aBtn.value = ++i;
alert(i)
}
}
</script>
</head>
<body>
<input type="button" value="0" />
</body>
</html>
输入两个数字，比较大小
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
<title>输入两个数字，比较大小</title>
<style>
body{font:12px/1.5 arial;text-align:center;}
.f-text{width:50px;border:1px solid #ccc;background:#f0f0f0;font-family:inherit;padding:3px;}
.f-btn{margin:0 10px;}
strong{padding:0 10px;}
span{font-weight:700;color:red;}
</style>
<script type="text/javascript">
window.onload = function ()
{
var aInput = document.getElementsByTagName("input");
var aSpan = document.getElementsByTagName("span")[0];
var i = 0;
for (i = 0; i < aInput.length - 1; i++)
{
aInput[i].onkeyup = function ()
{
this.value = this.value.replace(/[^\d]/,"")
}
}
aInput[2].onclick = function ()
{
(aInput[0].value == "" || aInput[1].value == "") ?
alert("请输入数字！") :
(aSpan.innerHTML = Math.max(aInput[0].value, aInput[1].value)) ;
}
};
</script>
</head>
<body>
<input type="text" class="f-text" /><strong>vs</strong><input type="text" class="f-text" /><input type="button" value="最大的数是 »" class="f-btn" /><span>？</span>
</body>
</html>
