// JavaScript Document
var mainPic_num=0;
var t=null;
var mainPic_sel=function(){
	var list=document.getElementById('list');
	var a=list.getElementsByTagName('a');
	var img=document.getElementById('pic').getElementsByTagName('img');
	for(var i=0; i<a.length; i++){
		a.item(i).className='';
		img.item(i).className='';
	}
	a.item(mainPic_num).className='sel';
	img.item(mainPic_num).className='sel';
	list.style.backgroundPosition='left '+(51*mainPic_num-60)+'px';
}
var mainPic_over=function(num){
	clearInterval(t);
	mainPic_num=num;
	mainPic_sel();
	mainPic();
}
var mainPic=function(){
	t=setInterval(function(){
							   mainPic_num=mainPic_num+1;
							   if(mainPic_num>3)mainPic_num=0;
							   mainPic_sel();
							   },3000);
}
var layer=function(){
	document.body.innerHTML+=('<a id="layer" href="recruit.htm"><img src="images/app_blank.gif" width="142" height="128" alt="2011年中国水产科学研究院渔业机械仪器研究所招聘公告" /><a>');
	//layer_move();
}
var layer_move=function(){
	document.getElementById("layer").style.top = document.documentElement.scrollTop + 100;
     document.getElementById("layer").style.right= 10;
	
	document.getElementById("layer2").style.top = document.documentElement.scrollTop + 228;
     document.getElementById("layer2").style.right= 10;
    setTimeout("layer_move();",100);
}
window.onload=function(){
	mainPic_sel();
	mainPic();
	mnav();
	layer();
}