var waitting = 1;              
var secondLeft = waitting;              
var timer;                              
var sourceObj;              
var number;              
function getObject(objectId)//获取id的函数               
    {              
        if(document.getElementById && document.getElementById(objectId)) {              
        // W3C DOM              
        return document.getElementById(objectId);              
        } else if (document.all && document.all(objectId)) {              
        // MSIE 4 DOM              
        return document.all(objectId);              
        } else if (document.layers && document.layers[objectId]) {              
        // NN 4 DOM.. note: this won't find nested layers              
        return document.layers[objectId];              
        } else {              
        return false;              
        }              
    }              
function SetTimer()//主导航时间延迟的函数              
    {              
        for(j=1; j <9; j++){              
            if (j == number){              
                if(getObject("mm"+j)!=false){              
                    getObject("mm"+ number).className = "menuhover";              
                    getObject("mb"+ number).className = "";              
                }              
            }              
            else{              
                 if(getObject("mm"+j)!=false){               
                    getObject("mm"+ j).className = "";              
                    getObject("mb"+ j).className = "hide";               
                }              
            }              
        }              
    }              
function CheckTime()//设置时间延迟后              
    {              
        secondLeft--;              
        if ( secondLeft == 0 )              
        {              
        clearInterval(timer);                                      
        SetTimer();                      
        }              
    }              
function showM(thisobj,Num)//主导航鼠标滑过函数,带时间延迟              
    {              
        number = Num;              
        sourceObj = thisobj;              
        secondLeft = 1;              
        timer = setTimeout('CheckTime()',100);              
    }              
function OnMouseLeft()//主导航鼠标移出函数,清除时间函数              
    {              
        clearInterval(timer);              
    }