getCaption(obj, state,strname) {
var index = obj.lastIndexOf(strname);
if (state == 0) {
obj = obj.substring(0, index);
} else {
obj = obj.substring(index + 1, obj.length);
}
return obj;
}
//调用
getCaption('abcefefef/9jccdmcdcmdm',1,"/9j") //9jccdmcdcmdm