function switchTag(tag,content,k,classty)
{
    var aclass,bclass,i,n
    if (classty=="T0") { 
	    aclass = "T1";
		bclass = "T2";
		n = 4;
	 }
	if (classty=="a000") { 
	    aclass = "a002";
		bclass = "a001";
		n = 4; 
   	 }
	if (classty=="test0") { 
	    aclass = "test1";
		bclass = "test2";
		n = 2; 
   	 }
	for(i=1; i <=n; i++)
	{
		if (i==k)
		{
			document.getElementById(tag+i).className=aclass;
			document.getElementById(content+i).className="h_lsit_show";
		}else{
			document.getElementById(tag+i).className=bclass;
			document.getElementById(content+i).className="h_lsit_none";
		}
	}
}