js中这段正则是做什么判断

Question

var letterChineseReg = /^[^"']{1,48}$/;

function validateName(name, len) {

    if (len==48) {

        if (!letterChineseReg.exec(name)) {

            return false;

        }

    }

    strLen = name.replace(/[^\x00-\xff]/g, "***").length;  // non letter is the lenght of three chars

    if (strLen>len) {

        return false;

    }

    return true;

}

if (!validateName(rep_name, 48)) {

    showWarningMsg("名称不合法");

    return false;

}

这段正则是做什么判断

var letterChineseReg = /^[^"']{1,48}$/

name.replace(/[^\x00-\xff]/g, "***").length