function change1(a,b,id){
	 document.getElementById(id).className = b;
	 document.getElementById(id).className = a;
	
}

<!--
/*第一种形式 第二种形式 更换显示样式*/
function setTab(name,cursel,n){
for(i=1;i<=n;i++){
var menu=document.getElementById(name+i);
var con=document.getElementById("con_"+name+"_"+i);
menu.className=i==cursel?"":"car2";
con.style.display=i==cursel?"block":"none";
}
}
function setTab3(name,cursel,n){
for(i=1;i<=n;i++){
var menu=document.getElementById(name+i);
var con=document.getElementById("con_"+name+"_"+i);
menu.className=i==cursel?"font_max huadong_b":"font_max huadong_a";
con.style.display=i==cursel?"block":"none";
}
}
function setTab4(name,cursel,n){
for(i=1;i<=n;i++){
var menu=document.getElementById(name+i);
var con=document.getElementById("con_"+name+"_"+i);
menu.className=i==cursel?"x2":"";
con.style.display=i==cursel?"block":"none";
}
}
function setTab5(name,cursel,n){
for(i=1;i<=n;i++){
var menu=document.getElementById(name+i);
var con=document.getElementById("con_"+name+"_"+i);
menu.className=i==cursel?"m_down":"";
con.style.display=i==cursel?"block":"none";
}
}
function setTabdibu(name,cursel,n){
for(i=1;i<=n;i++){
var menu=document.getElementById(name+i);
var con=document.getElementById("con_"+name+"_"+i);
menu.className=i==cursel?"active":"";
con.style.display=i==cursel?"block":"none";
}
}
//-->
//园区介绍滑动

function setTab1(name,type){
var cursel = document.getElementById("yuannumid").value;

if(type == "left")
{
    document.getElementById("yuannumid").value = parseInt(cursel) + 1;
	if(document.getElementById("yuannumid").value>5)
	{
	document.getElementById("yuannumid").value=1;
	cursel =1;
	}else{
	cursel = parseInt(cursel) + 1;
	}
}
else if(type == "right")
{
    document.getElementById("yuannumid").value = parseInt(cursel) - 1;
	if(document.getElementById("yuannumid").value<1)
	{
	    document.getElementById("yuannumid").value=5;
		cursel =5;
	}else{
	    cursel = parseInt(cursel) - 1;
	}
	
}
for(i=1;i<=5;i++){
var con=document.getElementById(name+i);
con.style.display=i==cursel?"block":"none";
}
}
function changelink(link1)
{
   var ln="/mayor_online/"+link1+"/Index.html";
  //alert(ln);
	window.open(ln);
}
function changelink1(link1)
{
   var ln=link1;
  
	window.open(ln);
}