Page load function

When the page is loaded we gave him set up some operations
① original page load event

<script>
    window.onload=function(){
        alert("第一种方式")
    }
</script>

②Jquery page loaded event (must import jquery)

<script src="jquery-1.11.3.min.js"></script>
<script>
    $(
        function () {
            alert("第二种方法");
        }
    );
</script>

This is the simplest two page load function