var sL=1;
function tp()
{
	var jx1=document.getElementById("jx1");
	var jx2=document.getElementById("jx2");
		if(sL==1)
		{
			cs1(jx1,1);
			cs1(jx2,0);			
			setTimeout('tp()',10000);
		}
		else if(sL==2){
			cs1(jx1,0);
			cs1(jx2,1);
			setTimeout('tp()',10000);
		}
		
		sL++;
		if(sL==3) sL=1;

}
function cs1(tpa,tpb)
{
	if(tpa==null){
		return;
	}
	tpa.filters.revealTrans.apply();
	if(tpb==1) tpa.style.visibility="visible";
	else tpa.style.visibility="hidden";
	tpa.filters.revealTrans.play();
}