JQ1 = 35>10并且6<20 = 真
JQ2 = 7*3 = 21
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<head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
<title>操作符优先级</title>
<script language="javascript">
var numa,numb,jq1;
numa=5;
numb=2;
jq1=numa + 30 >10 && numb * 3<20;
jq2=((numa + 30) / (7-numb)) * 3;
document.write("jq1的值是:"+jq1+"<br>");
document.write("jq2的值是:"+jq2);
</script>
</head>
<body>
</body>
</html>
