<html>
<head>
</head>
<body>
<div id="target" style="border: 2px solid black; width: 100px; height: 100px;"></div>
<div class="stone"></div>
<div class="stone"></div>
<div class="stone"></div>
</body>
<script type="text/javascript">
window.addEventListener("load", function () {
doWorkOnId();
doWorkOnClass();
})
function doWorkOnClass() {
var targets = document.getElementsByClassName("stone");
for (var i = 0; i < targets.length; i++) {
var targetStone = targets[i];
targetStone.style.width = "80px";
targetStone.style.height = "20px";
targetStone.style.border = "1px solid";
targetStone.style.borderColor = "green";
targetStone.innerHTML = "stone " + i;
console.log(targetStone);
}
};
function doWorkOnId() {
var target = document.getElementById("target");
target.style.borderColor = "red";
};
</script>
</html>