JS 纠错高手进 小弟不胜感激
MsgContent = MsgContent.replace("<img width=\"20\" height=\"20\" src=\"../images/Expression/1.png\">","%f0%9f%98%84"); //无法替换全部内容


MsgContent = MsgContent.replace(/"<img width=\"20\" height=\"20\" src=\"../images/Expression/1.png\">"/g,"%f0%9f%98%84"); //格式怎么修改？？？？？格式我调不好-。-
[解决办法]

MsgContent = MsgContent.replace(/<img width="20" height="20" src="\.\.\/images\/Expression\/1\.png">/g, "%f0%9f%98%84");