<p>fasfas</p><p>fkasjfkas</p><p>kasfjalsk</p><p>kasjfkas</p><p><img src="https://t12.baidu.com/it/u=2506809329,284241162&amp;fm=76" style="max-width:100%;"><br></p>
对HTML转义符号转换,
<p>fasfas</p><p>fkasjfkas</p><p>kasfjalsk</p><p>kasjfkas</p><p><img src="https://t12.baidu.com/it/u=2506809329,284241162&fm=76" style="max-width:100%;"><br></p>
function escape2Html(str) {
var arrEntities={'lt':'<','gt':'>','nbsp':' ','amp':'&','quot':'"'};
return str.replace(/&(lt|gt|nbsp|amp|quot);/ig,function(all,t){return arrEntities[t];});
}
var s = escape2Html("<p>fasfas</p><p>fkasjfkas</p><p>kasfjalsk</p><p>kasjfkas</p><p><img src="https://t12.baidu.com/it/u=2506809329,284241162&amp;fm=76" style="max-width:100%;"><br></p>");
alert(s);