// JavaScript Document
function showitem(i){
	if(i!=0){
           eval("document.all.item"+i+".style.visibility='visible';");
		   eval("document.all.navBg.style.visibility='visible';");	
	}
		   eval("document.all.navSpan"+i+".style.backgroundImage='url(img/nav.gif)';");	
		   eval("document.all.navSpan"+i+".style.backgroundPositionY='-40';");	
		   
       }
function hidemenu(){
	for (i=1;i<8;i++){
		eval("document.all.item"+i+".style.visibility='hidden';");
		eval("document.all.navSpan"+i+".style.backgroundImage='';");	
	}
	eval("document.all.navBg.style.visibility='hidden';");
	eval("document.all.navSpan0.style.backgroundImage='';");
}

function F(obj) {
	return(document.getElementById(obj));
}
//ͼƬչʾ
var timerstep = 0;
var nowstep = 0;
var picUrl = new Array();
var playTime = 5500; // ͼƬÇл»ËÙ¶È
function StartautoplayPic(){
	if (timerstep==0) {
		timerstep = setInterval('autoplayPic()',playTime);
	}	
}

function autoplayPic() {
	nowstep++;
	if (nowstep>7) {
		nowstep=1;
	}
	playPic(nowstep);
}

function doplayPic(num){
	nowstep = num;
	playPic(num);
}
function stopPlaypic(){
	if (timerstep!=0) {
		clearInterval(timerstep);
		timerstep = 0;
	}
	StartautoplayPic();
}
function playPic(num){
	F("ProPic").innerHTML="<img src='"+ getPic((num-1)) +"' width=610 height=286>";
	for(i=1;i<8;i++){
		F("ads"+ i).style.backgroundImage='url(img/sider/icon_'+ i +'.gif)';
		F("ads"+ i).style.backgroundPosition='left top';
		F("ads"+ i).style.backgroundRepeat='no-repeat';
	}
		F("ads"+ num).style.backgroundImage='url(img/sider/icon_'+ num +'.gif)';
		F("ads"+ num).style.backgroundPosition='left bottom';
		F("ads"+ num).style.backgroundRepeat='no-repeat';
}
function getPic(num){
	return(picUrl[num])
}