招生简章
javascript计算购买的总价格
script>
function checksum(){
var sum=0;
var aaa=document.form1.writer;
for(var i=0;i<aaa.length;i++){
if(aaa[i].checked){
sum=sum+parseInt(aaa[i].value);
}
}
totalprice.innerText=sum+"元";
}
</script>
</head>
<body>
<form id="form1" name="form1" method="post" action="">
<label>
<input name="writer" type="checkbox" id="writer" value="10" onclick="checksum();" />
像皮擦(10元)<br />
</label>
<p>
<input name="writer" type="checkbox" id="writer" value="20" onclick="checksum();" />
铅笔(20元)</p>
<p>
<input name="writer" type="checkbox" id="writer" value="30" onclick="checksum();" />
圆珠笔(30元)</p>
<p>
<input name="writer" type="checkbox" id="writer" value="40" onclick="checksum();" />
签字笔(40元)</p>
<p>
<input name="writer" type="checkbox" id="writer" value="50" onclick="checksum();" />
钢笔(50元)
</p>
<p>
<input type="submit" name="Submit" value="提交" />
</p>
总价：<span id=totalprice>0元</span> </p>
</form>
</body>
- 51.la