HTML-encoding lost when attribute read from input field

Question

I’m using JavaScript to pull a value out from a hidden field and display it in a textbox. The value in the hidden field is encoded.

For example,

Answer 1

Picking what escapeHTML() is doing in the prototype.js

Adding this script helps you escapeHTML:

String.prototype.escapeHTML = function() { 
    return this.replace(/&/g,'&').replace(//g,'>')
}

now you can call escapeHTML method on strings in your script, like:

var escapedString = "
this is HTML
".escapeHTML();
// gives: "<h1>this is HTML</h1>"

Hope it helps anyone looking for a simple solution without having to include the entire prototype.js