敏感词过滤：
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<title>Title</title>
<script>
window.onload = function () {
var oBtn = document.getElementById("btn");
var aT = document.getElementsByTagName("textarea");
oBtn.onclick = function () {
var re = /靠|SB|你妹的/ig;
aT[1].value = aT[0].value.replace(re, function (str) {
var tmp = '';
for (var i = 0; i < str.length; i++) {
tmp += "*";
}
return tmp;
});
};
}
</script>
</head>
<body>
原文 <br/>
<textarea name="" id="" cols="30" rows="10"></textarea>
<br>
替换后: <br>
<textarea name="" id="" cols="30" rows="10"></textarea>
<br>
<input type="button" value="替换" id="btn">
</body>
</html>
通过class选择元素：
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<title>Title</title>
<style>
div {
padding: 20px;
margin: 20px;
border: 1px solid #000;
}
</style>
<script>
function getByClass(cName, obj) {
var o = null;
if (arguments.length == 2) {
o = obj;
} else {
o = document;
}
var allNode = o.getElementsByTagName("*");
var aNode = [];
for (var i = 0; i < allNode.length; i++) {
var re = new RegExp('(\\s|^)' + cName + '(\\s|$)');
// if (allNode[i].className == cName) {
if (re.test(allNode[i].className)) {
aNode.push(allNode[i]);
}
}
return aNode;
}
window.onload = function () {
var oBox = document.getElementById("box2");
var allNode = getByClass('desc', oBox);
for (var i = 0; i < allNode.length; i++) {
allNode[i].style.border = '10px solid red';
}
}
</script>
</head>
<body>
<div id="box">
<div class="desc desc2"></div>
<div></div>
<div class="desc desc2"></div>
</div>
<div id="box2">
<div class="desc desc2"></div>
<div class="desc desc2"></div>
<div class="desc3 desc desc-2"></div>
</div>
</body>
</html>