正则替换内容

var str = "[可爱],很有趣，是啊[惊讶]";
var name=["[可爱]","[惊讶]"],
replacement={"[可爱]":"<img src='keai.gif' title='可爱'/>","[惊讶]":"<img src='jingya.gif' title='惊讶'/>"};
reg =new RegExp("("+name.join(")|(").replace(/([\[\]])/g,"\\$1")+")","g");
uw=str.replace(reg, function(word){

　　var rep=replacement[word];
    return rep ? rep : word;

});

用来大量替换内容，需要替换的内容在name和replacement里配置，像[]()\.等特殊字符需要进行处理，如replace(/([\[\]])/g,"\\$1")