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';
            tabs[i].onclick = function(){ tab.showpage(this); return false; };
        }

        if(window.location.hash) {
            var hash = window.location.hash;
            var p = parseInt(hash.charAt(hash.length - 1)); 
            tab.showpage(tab.setup.tabs[p]);
        }
    },
    
    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++) {
    	    if(i == num) {
    	        pages[num].style.display = 'block';
    	        tabs[num].className = 'present';
                window.location.hash = 'tab=' + i;
    	    }else{
    	        pages[i].style.display = 'none';
    	        tabs[i].className = null;
    	    }
    	}

    }
}