function show(){
	document.getElementById("bigbk").className="part2";
	document.getElementById("ssk1").style.display="block";
	document.getElementById("ssk2").style.display="block";
	document.getElementById("gd").style.display="none";
	document.getElementById("jy").style.display="block";
}
function hid(num){
	document.getElementById("bigbk").className="part1";
	document.getElementById("ssk1").style.display="none";
	document.getElementById("ssk2").style.display="none";
	document.getElementById("jy").style.display="none";
	document.getElementById("gd").style.display="block";
}

function change(){
	if(pause1){
		var iTimeoutID = setTimeout('change()', 7000);
		return;};
	if(document.getElementById("tj1").style.display != "none"){
		fuwei();
		document.getElementById("tj2").style.display="block";
	var iTimeoutID = setTimeout('change()', 7000);
		return;
	}
	if(document.getElementById("tj2").style.display!="none"){
		fuwei();
		document.getElementById("tj3").style.display="block";
	var iTimeoutID = setTimeout('change()', 7000);
		return;
	}
	if(document.getElementById("tj3").style.display!="none"){
		fuwei();
		document.getElementById("tj1").style.display="block";
	var iTimeoutID = setTimeout('change()', 7000);
		return;
	}	
}


function sd(num){
	fuwei();
	document.getElementById("tj"+num).style.display="block";
}

function fuwei(){
	document.getElementById("tj1").style.display="none";
	document.getElementById("tj2").style.display="none";
	document.getElementById("tj3").style.display="none";
}

var pause1 = false;