JavaScript实现HTML标签转义及反转义的两种方法

/**

 *  把html转义成HTML实体字符

 */

function HTMLEncode(html) {

    var temp = document.createElement("div");

    (temp.textContent != null) ? (temp.textContent = html) : (temp.innerText = html);

    var output = temp.innerHTML;

    temp = null;

    return output;

}

/**

 *  转义字符还原成html字符

 */

function HTMLDecode(text) { 

    var temp = document.createElement("div"); 

    temp.innerHTML = text; 

    var output = temp.innerText || temp.textContent; 

    temp = null; 

    return output; 

}

/**

 *  把html转义成HTML实体字符

 */

function htmlEncode(str) {

	var s = "";

	if (str.length === 0) {

		return "";

	}

	s = str.replace(/&/g, "&");

	s = s.replace(/</g, "<");

	s = s.replace(/>/g, ">");

	s = s.replace(/ /g, " ");

	s = s.replace(/\'/g, "'"); //IE下不支持实体名称

	s = s.replace(/\"/g, """);

	return s;

}

/**

 *  转义字符还原成html字符

 */

function htmlRestore(str) {

	var s = "";

	if (str.length === 0) {

		return "";

	}

	s = str.replace(/&/g, "&");

	s = s.replace(/</g, "<");

	s = s.replace(/>/g, ">");

	s = s.replace(/ /g, " ");

	s = s.replace(/'/g, "\'");

	s = s.replace(/"/g, "\"");

	return s;

}