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<!DOCTYPE html>
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
<title></title>
<meta charset="utf-8" />
</head>
<body>
<table id="tbl1" style="font-size:xx-large;color:red">
<tr>
<td>☆</td>
<td>☆</td>
<td>☆</td>
<td>☆</td>
<td>☆</td>
</tr>
</table>
<script type="text/javascript">
window.onload = function () {
var tdObjs = document.getElementsByTagName('td');
for (var i = 0; i < tdObjs.length; i++) {
//为td注册鼠标悬浮事件
tdObjs[i].onmouseover = function () {
for (var j = 0; j < tdObjs.length; j++) {
tdObjs[j].innerHTML = '☆';
}
for (var j = 0; j < tdObjs.length; j++) {
tdObjs[j].innerHTML = '★';
if (tdObjs[j] == this) {
break;
}
}
};
//为td注册鼠标离开事件
tdObjs[i].onmouseout = function () {
var index = -1;
for (var j = 0; j < tdObjs.length; j++) {
tdObjs[j].innerHTML = '☆';
if (tdObjs[j].getAttribute('isClicked')) {
index = j;
}
}
for (var m = 0; m <=index; m++) {
tdObjs[m].innerHTML = '★';
}
};
//为td注册鼠标点击事件
tdObjs[i].onclick = function () {
for (var n = 0; n < tdObjs.length; n++) {
tdObjs[n].removeAttribute('isClicked');
}
for (var k = 0; k < tdObjs.length; k++) {
tdObjs[k].innerHTML = '★';
if (tdObjs[k] == this) {
this.setAttribute('isClicked', 'true');
break;
}
}
}
}
};
</script>
<!--<script type="text/javascript">
window.onload = function () {
var tdObjs = document.getElementsByTagName('td');
for (var i = 0; i < tdObjs.length; i++) {
//注册鼠标悬浮事件
tdObjs[i].onmouseover = function () {
for (var k = 0; k < tdObjs.length; k++) {
tdObjs[k].innerHTML = '☆';
}
for (var m = 0; m < tdObjs.length; m++) {
tdObjs[m].innerHTML = '★';
if (tdObjs[m] == this) {
break;
}
}
};
//注册鼠标离开事件
tdObjs[i].onmouseout = function () {
var index = -1;
for (var j = 0; j < tdObjs.length; j++) {
tdObjs[j].innerHTML = '☆';
if (tdObjs[j].getAttribute('isClicked')) {
index = j;
}
}
for (var c = 0; c <= index; c++) {
tdObjs[c].innerHTML = '★';
}
};
//注册鼠标点击事件
tdObjs[i].onclick = function () {
for (var n = 0; n < tdObjs.length; n++) {
tdObjs[n].removeAttribute('isClicked');
}
for (var j = 0; j < tdObjs.length; j++) {
this.innerHTML = '★';
if (tdObjs[j] == this) {
//为td设置一个isClicked属性,用来标记哪个被点击
this.setAttribute('isClicked', 'true');
break;
}
}
};
}
};
</script>-->
</body>
</html>