/**
 * htmlEntities
 *
 * Convert all applicable characters to HTML entities
 *
 * object string
 * return string
 *
 * example:
 *   test = 'äöü'
 *   test.htmlEntities() //returns 'äöü'
 */
String.prototype.encodeHTML = function() {
	var chars = new Array ('&','à','á','â','ã','ä','å','æ','ç','è','é',
	                       'ê','ë','ì','í','î','ï','ð','ñ','ò','ó','ô',
	                       'õ','ö','ø','ù','ú','û','ü','ý','þ','ÿ','À',
	                       'Á','Â','Ã','Ä','Å','Æ','Ç','È','É','Ê','Ë',
	                       'Ì','Í','Î','Ï','Ð','Ñ','Ò','Ó','Ô','Õ','Ö',
	                       'Ø','Ù','Ú','Û','Ü','Ý','Þ','€','\"','ß','<',
	                       '>','¢','£','¤','¥','¦','§','¨','©','ª','«',
	                       '¬','­','®','¯','°','±','²','³','´','µ','¶',
	                       '·','¸','¹','º','»','¼','½','¾');
	
	var entities = new Array ('amp','agrave','aacute','acirc','atilde','auml','aring',
	                          'aelig','ccedil','egrave','eacute','ecirc','euml','igrave',
	                          'iacute','icirc','iuml','eth','ntilde','ograve','oacute',
	                          'ocirc','otilde','ouml','oslash','ugrave','uacute','ucirc',
	                          'uuml','yacute','thorn','yuml','Agrave','Aacute','Acirc',
	                          'Atilde','Auml','Aring','AElig','Ccedil','Egrave','Eacute',
	                          'Ecirc','Euml','Igrave','Iacute','Icirc','Iuml','ETH','Ntilde',
	                          'Ograve','Oacute','Ocirc','Otilde','Ouml','Oslash','Ugrave',
	                          'Uacute','Ucirc','Uuml','Yacute','THORN','euro','quot','szlig',
	                          'lt','gt','cent','pound','curren','yen','brvbar','sect','uml',
	                          'copy','ordf','laquo','not','shy','reg','macr','deg','plusmn',
	                          'sup2','sup3','acute','micro','para','middot','cedil','sup1',
	                          'ordm','raquo','frac14','frac12','frac34');
	
	newString = this;
	for (var i=0; i<chars.length; i++) {
		myRegExp = new RegExp();
		myRegExp.compile(chars[i], 'g')
		newString = newString.replace(myRegExp, '&' + entities[i] + ';');
	}
	return newString;
}