TinyMCE: parsing pasted html

gistfile1.js

$('#myEditor').tinymce({
  ...
	content_css: '/path_to/styles.css',
	paste_preprocess : function(pl, o) {
		// Content string containing the HTML from the clipboard
		o.content = strip_tags(o.content);
	},
	...
});

function strip_tags(input, allowed) {
	if (allowed === undefined) {
		allowed = '<table><tr><tbody><td><th><caption><object><a><h1><h2><h3><h4><h5><h6><p><br><ul><ol><li>';
	}
	//Taken from https://github.com/kvz/phpjs/blob/master/functions/strings/strip_tags.js
	allowed = (((allowed || "") + "").toLowerCase().match(/<[a-z][a-z0-9]*>/g) || []).join(''); // making sure the allowed arg is a string containing only tags in lowercase (<a><b><c>)
	var tags = /<\/?([a-z][a-z0-9]*)\b[^>]*>/gi,
		commentsAndPhpTags = /<!--[\s\S]*?-->|<\?(?:php)?[\s\S]*?\?>/gi;
	return input.replace(commentsAndPhpTags, '').replace(tags, function ($0, $1) {
		return allowed.indexOf('<' + $1.toLowerCase() + '>') > -1 ? $0 : '';
	});
}