html 转义js_js对html转义

function html_encode(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, """);   
  s = s.replace(/\n/g, "<br>");   
  return s;   
}   
function html_decode(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, "\"");   
  s = s.replace(/<br>/g, "\n");   
  return s;   
}