//首页产品类型和产品系列切换代码
function cc(num){
    for(var id = 1;id<=2;id++)
    {
    var mainlay="lay"+id;
	var maintt="tt"+id;
    if(id==num){
    document.getElementById(mainlay).style.display="block";
	document.getElementById(maintt).className="bg1";
	}
    else{
	document.getElementById(maintt).className="bg2";
	document.getElementById(mainlay).style.display="none";
	}
  }
}

//内页左菜单产品类型和产品系列的切换
function doMenu(i){

	if(document.all["submenu"+i].style.display=="block" && document.all["pic"+i].className=="m1"){
		document.all["submenu"+i].style.display ="none";
		document.all["pic"+i].className="m2"
	}else{
		document.all["submenu"+i].style.display="block";
		document.all["pic"+i].className="m1"
	}
}