<body>
<input type="button" value="去重" onclick="signal()">
<script>
var a = [1,5,7,8,9,4,0,1,5,10];
function signal(){ //对数组排序
a.sort(); //定义一个b数组，让数组的内容等于a的第一个数
var b = [a[0]]; //遍历
for(var i = 1;i< a.length;i++){ //如果数组a的内容和数组b的不相等，则将其加入到数组b中
if(a[i] !== b[b.length-1]){
b.push(a[i]);
}
}
alert(b);
}
</script>
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