JS实现全景图效果360度旋转

var scrl,direction="right";
var x,xold,xdiff, i=1;

function change(start){
if(direction == "right"){
if(div1.scrollTop+190 < div1.scrollHeight){
div1.scrollTop += 190;
}
else{
div1.scrollTop = 0;
}
}
else{
if(div1.scrollTop-190 > 0){
div1.scrollTop -= 190;
}
else{
div1.scrollTop = div1.scrollHeight;
}
}
if(start) scrl = setTimeout("change(1)",100);
else clearTimeout(scrl);
}

function getpos(){
x = event.clientX;
xdiff = x - xold;
xold = x;
if(xdiff>0) direction = "right";
if(xdiff