function newWindow(url, w, h) {
	var top = (screen.height - h) / 3;
	var left = (screen.width - w) / 2;
	var props = "width="+w+", height="+h+", top="+top+", left="+left+", scrollbars=1";
	window.open(url, "Administracia"+(new Date().getTime()), props);
}

function showTab(id){
	for (i=0;i<10;i++){
		if (el = document.getElementById('tab'+i)){
			if (id != 'tab'+i){
				document.getElementById('switchTab'+i).className = "";
				document.getElementById('tab'+i).style.display = 'none';
			} else {
				document.getElementById('switchTab'+i).className = "current";
				document.getElementById('tab'+i).style.display = 'block';
			}
		}
	}
}