利用DOM节点找对象和直接在标签属性中调函数传值this的书写区别

<div id="mouse" onmouseover="mOver()" onmouseout="mOut()" style="background-color:#D94A38;width:120px;height:20px;padding:40px;">Mouse Over Me</div>
<script>
function mOver(){
    document.getElementById("mouse").innerHTML="Thank You"
}
function mOut(){
    document.getElementById("mouse").innerHTML="Mouse Over Me"
}
</script>

<div onmouseover="mOver(this)" onmouseout="mOut(this)" style="background-color:#D94A38;width:120px;height:20px;padding:40px;">Mouse Over Me</div>
<script>
function mOver(obj){
    obj.innerHTML="Thank You"
}
function mOut(obj){
    obj.innerHTML="Mouse Over Me"
}
</script>