var ScrollBlock = function(elNode,mData){
	this.mData = mData || [];
	this.mEls = $$('td',$(elNode));
};

ScrollBlock.prototype = {
	next : function(){
		this.mData.push(this.mData.shift())
		this.build();
	},
	prev : function(){
		this.mData.unshift(this.mData.pop())
		this.build();
	},
	build : function(){

		for(var i=0,l=this.mEls.length;i<l;i++){
			this.mEls[i].innerHTML = this.mData[i];
		}
	}
};