escape in javascript

function escapeHtml(str) {
    return str.replace(/&/g, "&amp;").replace(/</g, "&lt;").replace(/>/g, "&gt;").replace(/"/g, "&quot;").replace(/'/g, "&#039;");
}function escapeHTML(text) {  
    var replacements= {"<": "&lt;", ">": "&gt;","&": "&amp;", """: "&quot;"};                      
    return text.replace(/[<>&"]/g, function(character) {  
        return replacements[character];  
    }); 
}escape sequences in javascript
\' single quote
\" doucle quote
\\ backslash
\n newline
\r carriage return
\t tab
\b backspace
\f form feed"\\n";