<!DOCTYPE html>
<html>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
<head>
var Price = 100
function getprice (){
var Getprice = document.getElementById("price").value;
if(Getprice>Price) //Price !=100
{
alert("余额不足")
};
else{
("正在出钱，等一辈子吧。")
};
}
function Sprice(){
var SPrice = document.getElementById(“price”).value;
Price=parseInt(SPrice)+Price //变量转换字符串 parseInt()
alert("你一共存了“+SPrice+",余额为"+Price)
}
</head>
<body>
<input type="text" id="price" value=""/>
<input type="button" value="点我取钱" onclick="getprice()"/>
<input type="button" value="点我存钱" onclick="Sprice"/>
</body>
</html>
js onclick事件(未测试)
原文：http://www.cnblogs.com/xanthechum/p/4325615.html
