//导航效果
function navCurrent(obj){
    for(var i = 1; i< 8; i++){
        document.getElementById("nav0"+i).className = ""       
    }
    var idStr = obj.id;
    obj.className= idStr + "_on";
}
function navHover(obj){
    for(var i = 1; i< 8; i++){
        document.getElementById("nav0"+i).className = ""       
    }
    var idStr = obj.id;
    obj.className= idStr + "_hover";
	
}

//教练图片列表鼠标效果
function doTrans(imgObj) 
{
	imgObj.className = imgObj.className == "trainer_on"?"":"trainer_on";
}