var tab = {
	init: function(){
		var tabs = this.setup.tabs;
		var pages = this.setup.pages;
		
		for(i=0; i<pages.length; i++) {
			if(i !== 0){
				pages[i].style.display = 'none';
			}else{
				var element = 'tabHead0'+i;
				document.getElementById(element).style.backgroundPosition = '0px 0px'; 
			}
			
			tabs[i].onclick = function(){ tab.showpage(this); return false; };
		}
		
	},
	
	showpage: function(obj){
		var tabs = this.setup.tabs;
		var pages = this.setup.pages;
		var num;
		
		for(num=0; num<tabs.length; num++) {
			if(tabs[num] === obj) break;
		}
		
		for(var i=0; i<pages.length; i++) {
			var element = 'tabHead0'+i;
			document.getElementById(element).style.backgroundPosition = '0px -46px'; 
			
			
			if(i == num) {
				pages[num].style.display = 'block';
				tabs[num].className = 'selected';
				document.getElementById(element).style.backgroundPosition = '0px 0px'; 
			}
			else{
				pages[i].style.display = 'none';
				tabs[i].className = null;
			}
			
		}
	}
}