var test = text.innerHTML; b = test.replace(/任晓强/g,"你好"); console.log(b);
html:
<div id="text">
任晓强去吃饭，任晓强去开车，任晓强去上班
</div>
正则：/任晓强/g可替换所有任晓强，/任晓强/只可替换第一个任晓强。
var test = text.innerHTML; b = test.replace(/(任晓强)/g,"<span class='cur'>$1</span>"); console.log(b); text.innerHTML = b;//把b的值付给text的div
function replaceTag(str){
return str.replace(/任晓强/g,function(match){
return "<span class='cur'>"+match+"</span>";
});
}
var test = text.innerHTML,
b = replaceTag(test);
text.innerHTML = b;
console.log(b);
捕获组任晓强外要加圆括号，任晓强外加span标签,并添加高亮样式。
function replaceTag(str){
return str.replace(/[<>]/g,function(match){
switch(match){
case "<":
return "<";
case ">":
return ">";
}
});
}
var test = text.innerHTML,
b = replaceTag(test);
text.innerHTML = b;
替换<>成为>和<，并插入页面