js html编码和解码函数（html实体和html字符串）_html 字符编码函数

//html编码，字符串转为实体
function htmlEncodeByRegExp(str) {
        var temp = "";
        if (str.length == 0) return "";
        temp = str.replace(/&/g, "&");
        temp = temp.replace(/</g, "&lt;");
        temp = temp.replace(/>/g, "&gt;");
        temp = temp.replace(/\s/g, "&nbsp;");
        temp = temp.replace(/\'/g, "&#39;");
        temp = temp.replace(/\"/g, "&quot;");
        return temp;
    }
//html实体解码，实体转为字符串。
function htmlDecodeByRegExp(str) {
        var temp = "";
        if (str.length == 0) return "";
        temp = str.replace(/&amp;/g, "&");
        temp = temp.replace(/&lt;/g, "<");
        temp = temp.replace(/&gt;/g, ">");
        temp = temp.replace(/&nbsp;/g, " ");
        temp = temp.replace(/&#39;/g, "\'");
        temp = temp.replace(/&quot;/g, "\"");
        return temp;
    }