function changeWord(state,num){
var cn_array=["关于贝斯","服务项目","服务案例","贝斯客户","新闻中心","招兵买马","联系我们"]
var en_array=["ABOUT","SERVICE","WORK","CLINETS","NEWS","JOIN US","CONTACT"]
var MenuID=window.document.getElementById("m"+num)

if(state=="over"){
MenuID.innerHTML=cn_array[num-1]
}
if(state=="out"){
MenuID.innerHTML=en_array[num-1]
}
}//end function