function getStyle(obj,name)

{

if(obj.currentStyle)

{

return obj.currentStyle[name];

}

else

{

return getComputedStyle(obj,false)[name];

}

}

var timer=null;

function move(obj,what,target){

clearInterval(obj.timer);

obj.timer=setInterval(function()

{

var cur=0;

if(what=='opacity')

{

cur=Math.round(parseFloat(getStyle(obj,what)));

}

else{

var cur=parseInt(getStyle(obj,what));

}

var speed=(target-cur)/6;

speed=speed>0?Math.ceil(speed):Math.floor(speed);

if(cur==target)

{

clearInterval(obj.timer);

}

else

{

if(what=='opacity')

{

obj.style.filter='alpha(opaity:'+(speed+cur)+')';

obj.style.opacity=(speed+cur)/100;

}

else

{

obj.style.width=cur+speed+'px';

}

}

},30);