function fixOP(){
	if(window.opera){
		elem = document.getElementById('shadow');
		elem.style.marginLeft = '1px';
	}
}
function changePic(elem, src){
	var tab = elem.getElementsByTagName('img');
	tab[0].src = './img/' + src + '_a.png';
}
function rechangePic(elem, src){
	var tab = elem.getElementsByTagName('img');
	tab[0].src = './img/' + src + '_m.png';
}
function $(name){
	return typeof name == "string" ? document.getElementById(name) : name;
}