javascript escape quote method

1stringToEscape.replace(/"/g, '\\\"')

1document.getElementById("something").innerHTML = "<img src='something' onmouseover='change(\"ex1\")' />";

1var string = 'this isn\'t a double quoted string';
2var string = "this isn\"t a single quoted string";
3//           ^         ^ same types, hence we need to escape it with a backslash