var curtab = 1;

function loadtab(tab) {
	if(tab != curtab) {
		$('tab_' + tab).className = "tab curtab";
		$('tab_' + curtab).className = "tab";
		$('box_' + tab).className = "tabbox curbox";
		$('box_' + curtab).className = "tabbox";
		curtab = tab;
	}
}