var currentTag = 1;

function fivetag(obj,id){
	
	selectMenu(obj);
	
	for (var i =1,j; j=document.getElementById("tag_content_"+i); i++)
	{
		j.style.display="none";
	}
	document.getElementById("tag_content_"+id).style.display="block";
	currentTag++;
	if (currentTag>5)
	currentTag=1;
}

function selectMenu(obj){
	
	var lia = document.getElementById("menulist").getElementsByTagName("li");
	var lialen = lia.length;
	for(i=0; i<lialen; i++){
		if(lia[i].getElementsByTagName("a")[0].className=="curMenu")
		lia[i].getElementsByTagName("a")[0].className = "";
	}
	obj.className = "curMenu";
}

var request = 
{ 
	QueryString : function(val) 
	{ 
		var uri = window.location.search; 
		var re = new RegExp("" +val+ "=([^&?]*)", "ig"); 
		return ((uri.match(re))?(uri.match(re)[0].substr(val.length+1)):null); 
	} 
} 

function init(){
	
	var rt = request.QueryString("Str");
	switch(rt)
	{
		case 'download':
		fivetag(document.getElementById("menulist").getElementsByTagName("li")[2].getElementsByTagName("a")[0],3);
		
		break;
		case 'tellfriend':
		fivetag(document.getElementById("menulist").getElementsByTagName("li")[1].getElementsByTagName("a")[0],2);
		break;
		case 'purchase':
		
		fivetag(document.getElementById("menulist").getElementsByTagName("li")[3].getElementsByTagName("a")[0],4);
		
		break;
		default:
		
		fivetag(document.getElementById("menulist").getElementsByTagName("li")[0].getElementsByTagName("a")[0],1);
		
	}
}


var roll_image = new Array;
var image_link = new Array;
var small_img = new Array;

roll_image[0] = 'images/01.jpg';
image_link[0] = 'http://www.iobit-online.com/eng/gamebooster.php?str=download';
small_img[0] = 'images/main_flash_button1_on.gif';

roll_image[1] = 'images/02.jpg';
image_link[1] = 'http://www.iobit-online.com/eng/advancedwindowscarepro.php?str=download';
small_img[1] = 'images/main_flash_button2_on.gif';

roll_image[2] = 'images/03.jpg';
image_link[2] = 'http://www.iobit-online.com/eng/iobitsmartdefrag.php?str=download';
small_img[2] = 'images/main_flash_button3_on.gif';



var cliImg = '';
var cliImgSrc = '';
var imgNo = 3;

var interval = 10000;
var setTime = '';

function click_simg(ci, no){
	
 var pImg = document.getElementById("bigimg");
 var pLink = document.getElementById("imglink");
 if(cliImg == '') {
  cliImg = ci;
  cliImgSrc = ci.src;
  ci.src = small_img[no];
  imgNo=no;
  pImg.src =roll_image[no];
  pLink.href = image_link[no];
 } else if(cliImg != ci) {
  cliImg.src = cliImgSrc;
  cliImg = ci;
  cliImgSrc = ci.src;
  ci.src = small_img[no];
  imgNo=no;
  pImg.src =roll_image[no];
  pLink.href = image_link[no];
 }
 clearTimeout(setTime);
 setTime=setTimeout("rotate()",interval);
}

function rotate(){
	
	var isIE = document.all &&window.external;
 imgNo = (imgNo >= 2) ? 0 : imgNo+1;

 
 var ci =document.getElementById("num_img"+imgNo);

if(isIE)
{
 document.all.bigimg.filters.blendTrans.apply();
 document.all.imglink.href=image_link[imgNo];
 document.all.bigimg.src=roll_image[imgNo];
 
 document.all.bigimg.filters.blendTrans.play();
}else
{

	document.getElementById("bigimg").src=roll_image[imgNo];
 document.getElementById("imglink").href=image_link[imgNo];

}
 if(cliImg == '') {
  cliImg = ci;
  cliImgSrc = ci.src;
  ci.src = small_img[imgNo];
 } else if(cliImg != ci) {
  cliImg.src = cliImgSrc;
  cliImg = ci;
  cliImgSrc = ci.src;
  ci.src = small_img[imgNo];
 }

 setTime=window.setTimeout("rotate()",interval);
}