请问为什么在点击调用函数后返回的sum值只是p1呢
<!DOCTYPE HTML>
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
<title>函数调用</title>
<script type="text/javascript">
function contxt() //定义函数
{
var {
Int p1 = document.getElementById("1").value;
Int p2 = document.getElementById("2").value;
Int sum = p1 + p2;
}
document.write(sum);
alert("哈哈，调用函数了!");
}
</script>
</head>
<body>
<form>
<input type="text" id="1"/>
<input type="text" id="2"/>
<input type="button" value="点击我" onclick=" contxt() " />
</form>
</body>
</html>
