kosso/strip_tags.html

## strip_tags.html
<html>

<head>

<script>

function strip_tags (str, allowed_tags) {
    // via http://kevin.vanzonneveld.net
    var key = '', allowed = false;
    var matches = [];
    var allowed_array = [];
    var allowed_tag = '';
    var i = 0;
    var k = '';
    var html = '';
    var replacer = function (search, replace, str) {
        return str.split(search).join(replace);
    };
    // Build allowes tags associative array
    if (allowed_tags) {
        allowed_array = allowed_tags.match(/([a-zA-Z0-9]+)/gi);
    }
    str += '';
    // Match tags
    matches = str.match(/(<\/?[\S][^>]*>)/gi);
    // Go through all HTML tags
    for (key in matches) {
			if(key){
				// Save HTML tag
				html = matches[key].toString();
				// Is tag not in allowed list? Remove from str!
				allowed = false;
				// Go through all allowed tags
				for (k in allowed_array) {
					if(k){
						// Init
						allowed_tag = allowed_array[k];
						i = -1;
						if (i != 0) { i = html.toLowerCase().indexOf('<'+allowed_tag+'>');}
						if (i != 0) { i = html.toLowerCase().indexOf('<'+allowed_tag+' ');}
						if (i != 0) { i = html.toLowerCase().indexOf('</'+allowed_tag)   ;}
						// Determine
						if (i == 0) {
							allowed = true;
							break;
						}
					}
				}
				if (!allowed) {
					str = replacer(html, "", str); // Custom replace. No regexing
				}
      }
    }
    return str;
}

function init(){

	var _html = '<h1>The title</h1> <p>blah blah <em>BLAH</em></p>';

	console.log('_html:', _html);

	var _text = strip_tags(_html);

	console.log('_text:', _text);

}


</script>
</head>
<body onload="init()">

test


</body>
</html>
	<html>

	<head>

	<script>

	function strip_tags (str, allowed_tags) {
	// via http://kevin.vanzonneveld.net
	var key = '', allowed = false;
	var matches = [];
	var allowed_array = [];
	var allowed_tag = '';
	var i = 0;
	var k = '';
	var html = '';
	var replacer = function (search, replace, str) {
	return str.split(search).join(replace);
	};
	// Build allowes tags associative array
	if (allowed_tags) {
	allowed_array = allowed_tags.match(/([a-zA-Z0-9]+)/gi);
	}
	str += '';
	// Match tags
	matches = str.match(/(<\/?[\S][^>]*>)/gi);
	// Go through all HTML tags
	for (key in matches) {
	if(key){
	// Save HTML tag
	html = matches[key].toString();
	// Is tag not in allowed list? Remove from str!
	allowed = false;
	// Go through all allowed tags
	for (k in allowed_array) {
	if(k){
	// Init
	allowed_tag = allowed_array[k];
	i = -1;
	if (i != 0) { i = html.toLowerCase().indexOf('<'+allowed_tag+'>');}
	if (i != 0) { i = html.toLowerCase().indexOf('<'+allowed_tag+' ');}
	if (i != 0) { i = html.toLowerCase().indexOf('</'+allowed_tag) ;}
	// Determine
	if (i == 0) {
	allowed = true;
	break;
	}
	}
	}
	if (!allowed) {
	str = replacer(html, "", str); // Custom replace. No regexing
	}
	}
	}
	return str;
	}

	function init(){

	var _html = '<h1>The title</h1> <p>blah blah <em>BLAH</em></p>';

	console.log('_html:', _html);

	var _text = strip_tags(_html);

	console.log('_text:', _text);

	}


	</script>
	</head>
	<body onload="init()">

	test



	</body>
	</html>