JavaScript获取数组最大值和最小值

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<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
<title>JavaScript获取数组最大值和最小值</title>
<script type="text/javascript">
    //获取数组最大值
function findMax()
{
var arr = [3,4,76,2,54,23,78,90,89,99,234,123,456,23,76,89,90];
var max = Array.max(arr);
document.getElementById("max").value = max;
}

//获取数组最大值函数
Array.max = function(arr)
{
return Math.max.apply(Math,arr);
}

//获取数组最小值
function findMin()
{
var arr = [34,4,3,67,89,30,23];
var min = Array.min(arr);
document.getElementById("min").value = min;
}

//获取数组最小值函数
Array.min = function(arr)
{
return Math.min.apply(Math,arr);
}

window.onload = function(){
findMax();
findMin();
};
</script>
</head>


<body>
   <label>数组最大值:</label>
   <input type="text" id="max"/>
   <label>数组最小值:</label>
   <input type="text" id="min"/>
</body>
</html>

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