function slideit(){
    var img = "swapinfo";
	try{
		if (!document.images) return;
		if(document.all){
			var rnd = Math.floor(Math.random()*23)+1;
			$(img).filters.revealTrans.Transition = rnd;
			$(img).filters.item(0).Apply();
		}
		$("infotext").innerHTML = eval("infotext" + step);
		$(img).src = eval("image"+step+".src");
		whichimage = step;
		changeBg();
		if (document.all) $(img).filters.item(0).Play();
		if (step < number_of_images){
			step++;
		}else{
			step=1;
		}
		if (document.all) {
			slideiTime = setTimeout("slideit()",speed*2000+2000);

} else {
			slideiTime = setTimeout("slideit()",speed*1000);
		}
	}catch(e){}
}

function clickSwap(imgnum){
	step = imgnum;
	var img = "swapinfo";
	clearTimeout(slideiTime);
	if (!document.images) return;
	if(document.all){
		var rnd = Math.floor(Math.random()*23)+1;
		$(img).filters.revealTrans.Transition = rnd;
		$(img).filters.item(0).Apply();
	}
	$("infotext").innerHTML = eval("infotext" + step);
	$(img).src=eval("image"+step+".src");
	whichimage = step;
	changeBg();
	if(document.all){
		$(img).filters.item(0).Play();
		slideiTime = setTimeout("slideit()", speed*2000+2000)
	}else{
		slideiTime = setTimeout("slideit()", speed*1000);
	}
}

function changeBg(){
	var nav = "";
	for (var i = 1; i <= number_of_images; i++){
		nav = "swapinfonav" + i;
		if (i == step) {
			$(nav).className = "select"
		}
		else {
			$(nav).className = ""
		}
	}	
}

function showMenu(curdiv, total){
	var div;
	for (var i = 0; i <= total; i++){
		div = $("sub"+i);
		if (div){
			if (i == curdiv) {
				div.style.display = "block";
			}
			else {
				div.style.display = "none";
			}
		}
	}
}

function vote(id, act, total){
	var checked = 0;
	if (act == "submit"){
		for (var i = 1; i < total; i++){
			if ($("vote"+id+"_"+i).checked){
				checked = $("vote"+id+"_"+i).value;
			}
		}
		
		if (checked == 0){
			alert("请选择一项进行投票");
			return false;
		}
	}
	
	var url = "votesubmit.asp?id="+id+"&act="+act+"&checked="+checked;
	//alert(url);
	var params = "";
	var updator = new Ajax.Updater('votelist'+id,url,{method: 'GET',parameters: params,evalScripts:true});
}

function checkgb(){
	if ($("nickname").value == "") {
		alert("请输入您的称呼");
		return false;
	}
	
	if ($("link").value == "") {
		alert("请输入您的联系方式");
		return false;
	}
	
	if ($("content").value == "") {
		alert("请输入您要留言的意见");
		return false;
	}
	
	return true;
}