两个js文件不能同时运行

问题遇到的现象和发生背景

两个js不能同时运行，只能运行一个

<script src="./js/翻页.js" >script>
<script src="./js/lunbotu.js" >script>
用代码块功能插入代码，请勿粘贴截图

这是第一个代码

window.onload= function () {
        var scroll=document.getElementsByClassName("scroll")[0];//ie不兼容，换成id会成功
        var panel=document.getElementsByClassName("panel");//ie不兼容，换成id会成功
 
        var clientH=window.innerHeight;
        scroll.style.height=clientH+"px";
        for(var i=0;i"px";
        }
        /*下面是关于鼠标滚动*/
        var inputC=document.getElementsByTagName("input");
        var wheel= function (event) {
            var delta=0;
            if(!event)//for ie
                event=window.event;
            if(event.wheelDelta){//ie,opera
                delta=event.wheelDelta/120;
            }else if(event.detail){
                delta=-event.detail/3;
            }
            if(delta){
                handle(delta,inputC);
            }
            if(event.preventDefault)
                event.preventDefault();
            event.returnValue=false;
        };
        if(window.addEventListener){
            window.addEventListener('DOMMouseScroll',wheel,false);
        }
        window.onmousewheel=wheel;
    };
    function handle(delta,arr) {
        var num;
        for(var i=0;i//得到当前checked元素的下标
            if(arr[i].checked){
                num=i;
            }
        }
        if(delta>0 && num>0){//向上滚动
            num--;
            arr[num].checked=true;
        }else if(delta<0 && num<4){//向下滚动
            num++;
            arr[num].checked=true;
        }
    }

这是第二个代码

window.onload = () => {
    let list = document.getElementById('list');
    let ol = document.getElementsByTagName('ol')[0];
    let display = document.getElementById('display');
    let currentIndex = 0;
    let autoPlay = () => {
        window.autoPlay = true;
        window.autoPlayTimer = setInterval(() => move((currentIndex + 1) % 5), 2000);
    }
    let stopPlay = () => {
        if (window.autoPlay) {
            window.autoPlay = false;
            clearInterval(window.autoPlayTimer);
        }
    }
    for (let i = 0; i < 5; i++) {
        let li = document.createElement('li');
        li.textContent = String(i + 1);
        li.className = 'index';
        if (i == 0) li.className += ' current';
        li.index = i;
        ol.appendChild(li);
        li.addEventListener('mouseover', function() {
            move(this.index);
            stopPlay();
        });
    }
    let arrow = document.getElementById('arrow');
    let showArrow = () => arrow.style.display = 'block';
    let hideArrow = () => arrow.style.display = 'none';
    let move = (index) => {
        let width = display.offsetWidth;
        for (let i = 0; i < 5; i++) {
            if ((index % 5) === i) {
                ol.children[i].className = 'index current';
            } else ol.children[i].className = 'index';
        }
        
        list.style.left = (-index) * width + 'px';
        currentIndex = index;
    }
    display.addEventListener('mouseover', showArrow)
    display.addEventListener('mouseleave', () => {
        hideArrow();
        if (!window.autoPlay) {
            
            autoPlay();
        }
    })
    
    let left = document.getElementById('left');
    let right = document.getElementById('right');
    left.addEventListener('click', () => {
        move((currentIndex - 1) === -1 ? 4 : currentIndex - 1);
        stopPlay();
    });
    right.addEventListener('click', () => {
        move((currentIndex + 1) % 5);
        stopPlay();
    });
    move(0);
    autoPlay();
}
我想要达到的结果

求能使两者同时运行

window.onload() 方法用于在网页加载完毕后立刻执行的操作，即当 HTML 文档加载完毕后，立刻执行某个方法。你定义了两个当然会执行一个，可以放在文档就绪函数里

 $(document).ready(function() {
        alert("欢迎！")
    })