/*addLoadEvent.js*/
function addLoadEvent(func) {
  var oldonload = window.onload;
  if (typeof window.onload != 'function') {
    window.onload = func;
  } else {
    window.onload = function() {
      oldonload();
      func();
    }
  }
}


function switchTag(tag,content,k,aclass,bclass,cclass)
{
    var aclass,bclass,i,n
	n = 12;
	
	for(i=1; i <=n; i++)
	{
		if (i==k)
		{
			document.getElementById(tag+i).className=aclass;
			document.getElementById(content+i).className=cclass;
		}else{
			document.getElementById(tag+i).className=bclass;
			document.getElementById(content+i).className="display_none";
		}
	}
}