[ruslan_mart]

<div id="test"></div>
<div id="test2">Hello World!</div>

var $ = function(a)
{
   if(this.$) return new $(a);

   this.elem = document.getElementById(a);
}

$.prototype = {
   css: function(obj, str)
   {
       if(typeof obj == 'object') for(var i in obj) this.elem.style[i] = obj[i];
       else if(typeof obj == 'string' && str) this.elem.style[obj] = str;
       return this;
   }
   html: function(text)
   {
       if(text) this.elem.innerHTML = text;
       else return this.elem.innerHTML;
       return this;
   }
}

$('test').html('This is text').css({
   color: 'red',
   fontWeight: 'bold',
   textAlign: 'center'
});

alert( $('test2').html() ); //Hello World!

$('test2').css('color', 'green');

Как пример.