javascript通过多个单选实现计价，求大佬指点一下，这玩意没效果
程序代码：
<!doctype html>
<html>
<head>
<meta charset="utf-8">
<title>第二次实验</title>
<link rel="stylesheet" href="CSS/style2.css">
<script>
function displayResult(){
var a=parseint(document.getElementsByName("cpu").value);
var b=parseint(document.getElementsByName("nc").value);
var c=parseint(document.getElementsByName("yp").value);
var d=parseint(document.getElementsByName("zb").value);
var e=parseint(document.getElementsByName("xk").value);
var f=parseint(document.getElementsByName("jx").value);
document.getElementById("jg").value=(a+b+c+d+e+f)
}
</script>
</head>
<body>
<main class="form">
<h3>个人电脑diy配置成本核算</h3>
<p>本计算仅提供参考<br>具体价格将随市场波动</p>
<form method="get">
<fieldset>
<legend>CPU</legend>
<input type="radio" id="cpu_1" name="cpu" onclick="displayResult(this.value)" value="1149">Intel 酷睿i5 9代
<input type="radio" id="cpu_2" name="cpu" onclick="displayResult(this.value)" value="3299">Intel 酷睿i7 10代
<input type="radio" id="cpu_3" name="cpu" onclick="displayResult(this.value)" value="4299">Intel 酷睿i9 10代
<input type="radio" id="cpu_4" name="cpu" onclick="displayResult(this.value)" value="3689">AMD Ryzen 9
</fieldset>
<fieldset>
<legend>内存</legend>
<input type="radio" id="nc_1" name="nc" onclick="displayResult(this.value)" value="459">金士顿(Kingston) DDR4 2666 16GB
<input type="radio" id="nc_2" name="nc" onclick="displayResult(this.value)" value="1149">金士顿(Kingston) DDR4 3200 32GB<br>
<input type="radio" id="nc_3" name="nc" onclick="displayResult(this.value)" value="529">海盗船(USCORSAIR)DDR4 3200 16GB
<input type="radio" id="nc_4" name="nc" onclick="displayResult(this.value)" value="1149">海盗船(USCORSAIR)DDR4 3200 32GB
</fieldset>
<fieldset>
<legend>硬盘</legend>
<input type="radio" id="yp_1" name="yp" onclick="displayResult(this.value)" value="389">希捷BarraCuda（ST2000DM008）2TB
<input type="radio" id="yp_2" name="yp" onclick="displayResult(this.value)" value="649">希捷BarraCuda（ST4000DM004）4TB<br>
<input type="radio" id="yp_3" name="yp" onclick="displayResult(this.value)" value="1799">希捷BarraCuda（ST8000DM004）8TB
<input type="radio" id="yp_4" name="yp" onclick="displayResult(this.value)" value="4399">希捷银河Exos X16（ST16000NM002G）16TB
</fieldset>
<fieldset>
<legend>主板</legend>
<input type="radio" id="zb_1" name="zb" onclick="displayResult(this.value)" value="699">华硕 B360
<input type="radio" id="zb_2" name="zb" onclick="displayResult(this.value)" value="769">微星B450M MORTAR MAX<br>
<input type="radio" id="zb_3" name="zb" onclick="displayResult(this.value)" value="1299">技嘉Z370 HD3
<input type="radio" id="zb_4" name="zb" onclick="displayResult(this.value)" value="1899">七彩虹iGame Z490 Vulcan X V20
</fieldset>
<fieldset>
<legend>显卡</legend>
<input type="radio" id="xk_1" name="xk" onclick="displayResult(this.value)" value="899">影驰GeForce GTX 1050Ti大将
<input type="radio" id="xk_2" name="xk" onclick="displayResult(this.value)" value="3299">丽台Quadro M2000<br>
<input type="radio" id="xk_3" name="xk" onclick="displayResult(this.value)" value="8999">七彩虹iGame GeForce RTX 2080 Ti
<input type="radio" id="xk_4" name="xk" onclick="displayResult(this.value)" value="29999">华硕ROG-MATRIX-RTX2080Ti-P11G-GAMING
</fieldset>
<fieldset>
<legend>机箱</legend>
<input type="radio" id="jx_1" name="jx" onclick="displayResult(this.value)" value="239">先马黑洞7
<input type="radio" id="jx_2" name="jx" onclick="displayResult(this.value)" value="700">酷冷至尊MasterCase H500P
<input type="radio" id="jx_3" name="jx" onclick="displayResult(this.value)" value="1999">骨伽征服者
<input type="radio" id="jx_4" name="jx" onclick="displayResult(this.value)" value="6999">Phanteks追风者
</fieldset>
<p><button type="button" onclick="displayResult()">查看价格</button><input type="text" id="jg"></p>
</form>
</main>
</body>
</html>
