前端编解码js

function html_encode(str) {
    var s = "";
    if (str.length == 0) return "";
    s = str.replace(/&/g, "&");
    s = s.replace(/</g, "&lt;");
    s = s.replace(/>/g, "&gt;");
    s = s.replace(/ /g, "&nbsp;");
    s = s.replace(/\'/g, "&#39;");
    s = s.replace(/\"/g, "&quot;");
    s = s.replace(/\n/g, "<br/>");
    return s;
}

function html_decode(str) {
    var s = "";
    if (str.length == 0) return "";
    s = str.replace(/&amp;/g, "&");
    s = s.replace(/&lt;/g, "<");
    s = s.replace(/&gt;/g, ">");
    s = s.replace(/&nbsp;/g, " ");
    s = s.replace(/&#39;/g, "\'");
    s = s.replace(/&quot;/g, "\"");
    s = s.replace(/<br\/>/g, "\n");
    return s;
}

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