实现方案就是匹配富文本里面有没有url(),如果有就证明是京东的富文本（普通后台的富文本编辑器不会把图片放入url()），然后把所有图片提取出来，然后把所有图片字符串拼接到一起，显示到页面即可。

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var regex1 = /url\((.+?)\)/g; // () 小括号
var arr=[];
arr=str.match(regex1);
var newstr="";
var richtext="";
var j=0;
var len=0;
if(arr){
	for(j = 0,len=arr.length; j < len; j++) {
			newstr=arr[j];
			newstr=newstr.replace(/url\(/, "");
			newstr=newstr.replace(/\)/, "");
			//console.log(newstr);
			richtext+='<img src="'+newstr+'"  style="width:100%;height:auto;display:block;" />';
	}
document.write(richtext);
}else {
var richtext=str;
document.write(richtext);
}

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