家装监理
                        4大验收阶段 78项验收标准全程把关
                    
                
                

                    
                    
                        家装监理
                        4大验收阶段 78项验收标准全程把关
                    
                

    var sp1 = document.getElementById("sp1");
    var sp2 = document.getElementById("sp2");
    var p1 = document.getElementById("p1");
    var p2 = document.getElementById("p2");
    var bottom = document.getElementById("bottom");
    var ps = bottom.getElementsByTagName("p");
    var spans = bottom.getElementsByTagName("span");
    var speed =-10;
    var start =260;
    var timer ;
    var timerout;
for (var i = 0; i < ps.length; i++) {
        // ps[i].index = i;
        ps[i].onmouseover=function(num){
         return function(){
            if (timer) {
                clearInterval(timer);
                start=260;
                
            };
            timer = setInterval(function(){
            start +=speed;
            if (start<=0) {
                start=0;
                clearInterval(timer);
            };
            // console.log(this.index);
            spans[num].style.top = start+"px";
        },100)
        }}(i)
    
    };
    for (var i = 0; i < ps.length; i++) {
        ps.index = i;
        ps[i].onmouseout = function(){
            timerout = setInterval(function(){
                **start = parseInt(spans[this.index].style.top);**
                start -=speed;
                spans[this.index].style.top = start+"px";
            },100);
        }
    };
}