function switchTag(tag,content,k,classty)
{
    var aclass,bclass,i,n
  	if (classty=="box") { 
	    aclass = "aa1";
		bclass = "aa2";
		n = 5; 
   	 }
	 
	for(i=1; i <=n; i++)
	{
		if (i==k)
		{
			document.getElementById(tag+i).className=aclass;
			document.getElementById(content+i).className="box_show";
		}else{
			document.getElementById(tag+i).className=bclass;
			document.getElementById(content+i).className="box_none";
		}
	}
}
function MM_jumpMenu(selObj,restore){
  window.open(selObj.options[selObj.selectedIndex].value);
  if (restore) selObj.selectedIndex=0;
}