加入购物车按钮的代码(小程序加入购物车代码)

<script language='javascript'>

function checkSum()

{

var sum = 0;

for(var i=0;i<document.form1.elements["writer"].length;i++)

{

if(document.form1.elements["writer"][i].checked)

{

sum = sum +parseInt(document.form1.elements["writer"][i].value);

}

}

totalprice.innerText = sum +" 元";

}

</script>

<form method=post name=form1>

<input type="checkbox" name=writer value="34" onclick="checkSum()">韩国耳饰tm56（34元）<br>

<input type="checkbox" name=writer value="46" onclick="checkSum()">纯银吊坠tc34（46元）<br>

<input type="checkbox" name=writer value="30" onclick="checkSum()">黄莺手镯ta345（30元）<br>

<input type="checkbox" name=writer value="40" onclick="checkSum()">翡翠玉镯1346（40元）<br>

<input type="checkbox" name=writer value="50" onclick="checkSum()">天涯耳饰1233（50元）<br>

<br>

总价为：<span id="totalprice">0 元</span>

</form>