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<title>求出数组中所有数字的和</title>
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#outer input{padding:3px;border:1px solid #ccc;font-family:inherit;width:220px;margin-right:10px;}
.sum{font-size:30px;color:red;}
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var sum = 0;
var oInput = document.getElementsByTagName("input")[0].value.split(",");
for (var i in oInput)
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sum += parseInt(oInput[i])
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oStrong.innerHTML = sum
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<div id="outer">
<label><input type="text" value="1,2,3,4,5,6,7,8,9,10,11,12,13,14,15" /><span>输入数字求和，数字之间用半角","号分隔</span></label>
<p><button>求和</button></p>
<strong class="sum"></strong>
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弹出层效果
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<center><button>弹出层</button></center>
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