// javascript document
function getbyclass(oparent,name)
{
	var aclass = oparent.getelementsbytagname('*');
	var arlt = [];
	for(var i=0; i<aclass.length; i++)
	{
		if(aclass[i].classname==name)
		{
			arlt.push(aclass[i]);
		}
	}
	return arlt;
}

function getstyle(obj,name)
{
	if(obj.currentstyle)
	{
		return obj.currentstyle[name]
	}
	else
	{
		return getcomputedstyle(obj,false)[name]
	}
}

function startmove(obj,stylename,itarget)
{
	clearinterval(obj.timer)
	obj.timer = setinterval(function(){
          var now = 0;
		  if(stylename=='opacity')
		  {
			  now = math.round((parsefloat(getstyle(obj,stylename))*100));
		  }
		  else
		  {
			  now = parseint(getstyle(obj,stylename));
		  }
		  var speed = (itarget-now)/6;
		  speed = speed>0?math.ceil(speed):math.floor(speed);
		  if(now == itarget)
		  {
			  clearinterval(obj.timer)
		  }
		  else
		  {
			  if(stylename=='opacity')
			  {
				  obj.style.opacity = (now+speed)/100;
				  obj.style.filter = 'alpha(opacity='+(now+speed)+')'
			  }
			  else
			  {
				  obj.style[stylename] = now+speed+'px';
			  }
		  }
	},30)
}