Element.grabParent.js

//gets the first matching ancestor up the tree, or returns false
//cond can be 'tag', '.classname', '#id-name', Element
Element.implement({
	grabParent: function(cond,include_self) {
		var parents = this.getParents(),
			true_cond = '',
			ret = false,
			el,
            i;
		
        include_self = include_self || false;
		true_cond = (typeof(cond) == 'string') ? cond.substring(1) : cond;
		
		if(include_self)
			parents.unshift(this);
	
		parents = parents.reverse();
		for(i = parents.length; i > -1; i--) {
			el = parents[i];
            if(!el)
                continue;
			if(typeof(cond) == 'object' && cond.$family.name == 'element') {
				if(el === true_cond)
					return el;
				continue;
			}
				
			if((cond.charAt(0) == '#' && $(el).get('id') == true_cond) || (cond.charAt(0) == '.' && $(el).hasClass(true_cond)) ||($(el).get('tag') == cond.toLowerCase()))
				return el;
		}
		
		return false;
	}
});