javascript调试测试，利用vs2008：智能对象类型感知，方法及属性提示；立即窗口调试等

<!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>
    <title>测试vs2008对js脚本的支持能力</title>
    <script type="text/jscript">
    //订购产品总价每500元的倍数打折5%，最低85折扣；每500元的倍数会员等级+1
        function calculate()
        {
            var price = document.getElementById("txtPrice").value;
            var count = document.getElementById("txtCount").value;
            var result = document.getElementById("txtResult").value;
            var spanStar = document.getElementById("spanStar");
            var result = price * count;
            var rr = parseInt( result / 500) ;
            var star=0;
            switch(rr)
            {
                case 0:
                case 1:
                case 2:
                case 3:
                    result *=(1-rr*0.05);
                    star = rr;
                    break;
                default:
                    result  *= 0.8;
                    star = 4;
                    break;
            }
            //vs2008的智能感知知道spanStar是个span空间，我们可以利用其立即窗口调试
            spanStar.innerHTML = "您是" + star + "星级会员，谢谢惠顾！";
            txtResult.value = result;
        }
    </script>
</head>
<body>
产品价格：<input id="txtPrice" type="text" /><br />
订购数量：<input id="txtCount" type="text" /><br />
交付金额：<input id="txtResult" type="text" readonly="readonly" /><br />
<span id="spanStar"></span>
<input id="btnCalc" type="button" value="计算" onclick="calculate()" />
</body>
</html>