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java-script-htmldoc
/
array&doc.html

<!DOCTYPE html>
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
<title>javascript&doc</title>

</head>

<body>
    <!--结果展现-->
    <div role="layout">
        <h3>结果一：<span class="result">text!</span></h3>
        <h3>结果二：<span class="result"></span></h3>
        <h3>结果三：<span class="result"></span></h3>
        <h3>结果四：<span class="result"></span></h3>
        <h3>结果五：<span class="result"></span></h3>
        <h3>结果六：<span class="result"></span></h3>
    </div>

</body>
</html>
<script>
    var x=Math.PI;
	var y=Math.abs(8);
	var z=Math.acos(19);
	var w=Math.asin(99);
	var a=Math.atan(71);
	var b=Math.cos(32);
	var result=document.getElementsByClassName("result");
	    result[0].innerHTML=x;
		result[1].innerHTML=y;
		result[2].innerHTML=z;
		result[3].innerHTML=w;
		result[4].innerHTML=a;
		result[5].innerHTML=b;


</script>