// JavaScript Document

function popJump(obj)
{
	location.href = obj.options[obj.selectedIndex].value;
}


/*--setup--*/
window.onload=function() {
	if(document.getElementById('tab')){
		tab.setup = {
			   tabs: document.getElementById('tab').getElementsByTagName('li'),
			   
			   pages: [
				  document.getElementById('ranking1'),
				  document.getElementById('ranking2'),
				  document.getElementById('ranking3'),
				  document.getElementById('ranking4')
			   ]
		}
		tab.init();
	}
}
/*--setup end--*/

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';
			  pages[i].style.position = 'relative';
		 }
         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++) {
         if(i == num) {
            pages[num].style.display = 'block';
            tabs[num].className = 'selected';
         }
         else{
            pages[i].style.display = 'none';
            tabs[i].className = null;
         }
      }
   }
}