JavaScript获取数组最大值和最小值

1、实现源码
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<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>
2、实现结果