function preloadImages(imgs,callback,series)
{
	var i,img_array=new Array();
	if(arguments.length<2)callback='';
	if(arguments.length<3)series=0;
	for(i=0;i<imgs.length;i++)
	{
		img_array[i]=new Image();
		if(callback!='')eval('img_array[i].onload=function(){'+callback+'("'+imgs[i]+'",'+series+');}');
		img_array[i].src=imgs[i];
	}
	return true;
}