function addEvent(init) {
	if (window.addEventListener) {
		window.addEventListener("load",init, false);
	} else if (window.attachEvent) {
		window.attachEvent("onload",init);
	}
}

addEvent(function(){ tab_h('tabA','url(./../tour/images/c1_tab1.gif)'); tab_b('tab1'); });

function tab_h(tabh,tabi) {
	document.getElementById('tabA').style.backgroundImage = 'url(./../tour/images/c1_tab1.gif)';
	document.getElementById('tabB').style.backgroundImage = 'url(./../tour/images/c1_tab2.gif)';
if(tabh) {
	document.getElementById(tabh).style.backgroundImage = tabi;
	}
}

function tab_b(tabb) {
	document.getElementById('tab1').style.display = 'none';
	document.getElementById('tab2').style.display = 'none';
if(tabb) {
	document.getElementById(tabb).style.display = 'block';
	}
}