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=0; j <10; 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);
    }