function boxmove(d1,d2,d3,e,obj){ 
    var speed=30; 
    var demo=document.getelementbyid(d1);  
    var demo1=document.getelementbyid(d2);  
    var demo2=document.getelementbyid(d3); 
    demo2.innerhtml=demo1.innerhtml; 
    function boxtop(){ 
            if(demo2.offsettop-demo.scrolltop<=0){demo.scrolltop-=demo1.offsetheight} 
            else{demo.scrolltop++} 
        } 
    function boxright(){ 
            if(demo.scrollleft<=0){demo.scrollleft+=demo2.offsetwidth} 
            else{demo.scrollleft--} 
        } 
    function boxbottom(){  
            if(demo1.offsettop-demo.scrolltop>=0){demo.scrolltop+=demo2.offsetheight} 
            else{demo.scrolltop--} 
        } 
    function boxleft(){ 
            if(demo2.offsetwidth-demo.scrollleft<=0){demo.scrollleft-=demo1.offsetwidth} 
            else{demo.scrollleft++} 
        } 
    if(e==1){ 
            var movetop=setinterval(boxtop,speed); 
            demo.onmouseover=function(){clearinterval(movetop);} 
            demo.onmouseout=function(){movetop=setinterval(boxtop,speed)} 
        } 
    if(e==2){ 
            var moveright=setinterval(boxright,speed); 
            demo.onmouseover=function(){clearinterval(moveright)} 
            demo.onmouseout=function(){moveright=setinterval(boxright,speed)} 
        } 
    if(e==3){ 
            var movebottom=setinterval(boxbottom,speed); 
            demo.onmouseover=function(){clearinterval(movebottom);} 
            demo.onmouseout=function(){movebottom=setinterval(boxbottom,speed)} 
        } 
    if(e==4){ 
            var moveleft=setinterval(boxleft,speed) 
            demo.onmouseover=function(){clearinterval(moveleft)} 
            demo.onmouseout=function(){moveleft=setinterval(boxleft,speed)} 
        } 
    if(e=="top"){ 
            movetop=setinterval(boxtop,speed) 
            obj.onmouseout=function(){clearinterval(movetop);} 
        } 
    if(e=="right"){ 
            moveright=setinterval(boxright,speed) 
            obj.onmouseout=function(){clearinterval(moveright);} 
        } 
    if(e=="bottom"){ 
            movebottom=setinterval(boxbottom,speed) 
            obj.onmouseout=function(){clearinterval(movebottom);} 
        } 
    if(e=="left"){ 
            moveleft=setinterval(boxleft,speed) 
            obj.onmouseout=function(){clearinterval(moveleft);} 
        } 
    }