compat.js

This is the script which used on 10minutemail.com for temporary email.

/**
 * Compat functions
 * @category	HTML
 * @package	AJAX
 * @author	Joshua Eichorn <[e-mail]>
 * @copyright	2005 Joshua Eichorn
 * @license	http://www.opensource.org/licenses/lgpl-license.php  LGPL
 */
/**
 *  Functions for compatibility with older browsers
 */
if (!String.fromCharCode && !String.prototype.fromCharCode) {
	String.prototype.fromCharCode = function(code)
	{
		var h = code.toString(16);
		if (h.length == 1) {
			h = '0' + h;
		}
		return unescape('%' + h);
	}
}
if (!String.charCodeAt && !String.prototype.charCodeAt) {
	String.prototype.charCodeAt = function(index)
	{
		var c = this.charAt(index);
		for (i = 1; i < 256; i++) {
			if (String.fromCharCode(i) == c) {
				return i;
			}
		} 
	}
}
// http://www.crockford.com/javascript/remedial.html
if (!Array.splice && !Array.prototype.splice) {
	Array.prototype.splice = function(s, d)
	{
		var max = Math.max,
		min = Math.min,
		a = [], // The return value array
		e,  // element
		i = max(arguments.length - 2, 0),   // insert count
		k = 0,
		l = this.length,
		n,  // new length
		v,  // delta
		x;  // shift count

		s = s || 0;
		if (s < 0) {
			s += l;
		}
		s = max(min(s, l), 0);  // start point
		d = max(min(typeof d == 'number' ? d : l, l - s), 0);	// delete count
		v = i - d;
		n = l + v;
		while (k < d) {
			e = this[s + k];
			if (!e) {
				a[k] = e;
			}
			k += 1;
		}
		x = l - s - d;
		if (v < 0) {
			k = s + i;
			while (x) {
				this[k] = this[k - v];
				k += 1;
				x -= 1;
			}
			this.length = n;
		} else if (v > 0) {
			k = 1;
			while (x) {
				this[n - k] = this[l - k];
				k += 1;
				x -= 1;
			}
		}
		for (k = 0; k < i; ++k) {
			this[s + k] = arguments[k + 2];
		}
		return a;
	}
}
if (!Array.push && !Array.prototype.push) {
	Array.prototype.push = function()
	{
		for (var i = 0, startLength = this.length; i < arguments.length; i++) {
			this[startLength + i] = arguments[i];
		}
		return this.length;
	}
}
if (!Array.pop && !Array.prototype.pop) {
	Array.prototype.pop = function()
	{
		return this.splice(this.length - 1, 1)[0];
	}
}
/*
	From IE7, version 0.9 (alpha) (2005-08-19)
	Copyright: 2004-2005, Dean Edwards (http://dean.edwards.name/)
*/
if (!DOMParser.parseFromString && window.ActiveXObject)
{
function DOMParser() {/* empty constructor */};
DOMParser.prototype = {
	parseFromString: function(str, contentType) {
		var xmlDocument = new ActiveXObject('Microsoft.XMLDOM');
		xmlDocument.loadXML(str);
		return xmlDocument;
	}
};

function XMLSerializer() {/* empty constructor */};
XMLSerializer.prototype = {
	serializeToString: function(root) {
		return root.xml || root.outerHTML;
	}
};
}