//tabs-related functions and variables
	
function $(elId) {
	return document.getElementById(elId);
}

function activateTab(tabName) {
	var activeA = $(tabName+'_a');
	activeA.className = 'activ_tab';
	if(activeTabName != tabName) {
		restoreTab(activeTabName);
		activeTabName = tabName;
	}
}

function restoreTab(tabName) {
	var restoreA = $(tabName+'_a');
	restoreA.className = 'inactiv_tab';
}

var window_onload = window.onload;
window.onload  = function() {
	if(window_onload) {
		window_onload();
	}
	//activateTab(activeTabName);
	$(activeTabName+'_a').onclick();
}