var Attitude = new Object();
Object.extend(Attitude, {
	sheets: [],

	append: function(sheet){
		this.sheets.push(sheet);
	},

	start: function(){
		for (var i=0; sheet=this.sheets[i]; i++) this.update(sheet);
	},

	update: function(sheet){ 
		for (selector in sheet){
			var combs = selector.split(',');
			for (c=0; comb=combs[c]; c++) {
				var elements = this.getSelector(comb.replace(/^\s*|\s*$/g,"")) || null;
				for (var i=0; element=elements[i]; i++) sheet[selector](element);
			}
		}
	},

	getSelector: function(selector){
		var args = selector.split(' ');
		var params = [];
		for (var j=0; arg=args[j]; j++) {
			params[j] = param = new Array();
			if (args[j].indexOf('#') > -1) {
				var bits = arg.split('#');
				param['tag'] = bits[0] || '*';
				param['id'] = bits[1];
			}
			else if (args[j].indexOf('.') > -1) {
				var bits = arg.split('.');
				param['tag'] = bits[0] || '*';
				param['class'] = bits[1];
			}
			else {
				param['tag'] = arg;
			}
		}
		this.filter = [document];
		for (var k=0; param=params[k] ;k++){
			if (k == 0 && param['id']) {
				if (param['tag'] == '*' || $(param['id']).tagName.toLowerCase() == param['tag'])
					this.filter = [$(param['id'])];
				else return [];
				continue;
			}
			this.filter = this.getElementsWithTagName(param['tag']);
			if (param['class']) this.filter = this.getElementsWithClassName(param['class']);
			else if (param['id']) this.filter = this.getElementsWithId(param['id']);
		}
		return this.filter;
	},

	getElementsWithId: function(id){
		var found = [];
		for (var i = 0; el=this.filter[i]; i++) {
			if (el.id == id) found.push(el);
		}
		return found;
	},

	getElementsWithClassName: function(className){
		var found = [];
		for (var i = 0; el=this.filter[i]; i++) {
			if (Element.hasClassName(el, className)) found.push(el);
		}
		return found;
	},

	getElementsWithTagName: function(tagName){
		var found = [];
		for (var i=0; el=this.filter[i]; i++){
			var tagNames = el.getElementsByTagName(tagName);
			for (var j=0; taag=tagNames[j]; j++) found.push(taag);
		}
		return found;
	}
});