function on(div){
	var object =div.getElementsByTagName('img').item(0);
	object.src='../images/arrow_rollover.jpg';
	div.className='menu_hover';
}

function off(div){
	var object =div.getElementsByTagName('img').item(0);
	object.src='../images/arrow.jpg';
	div.className='menu_normal';
}




function openIndexMenu(menu) {
	var offset=0;
	if(navigator.userAgent.indexOf("Chrome")>-1) {
		offset=-1;	
	}
	else if(navigator.userAgent.indexOf("Safari")>-1) {
		offset=2;	
	}
	
	on(menu.getElementsByTagName('div').item(0));
	
	var area=getobj(menu);
	var dropdown=menu.getElementsByTagName('div').item(1);
	dropdown.className='dropdown_visible';	
	/*dropdown.style.left=area[0]+78+"px";
	dropdown.style.top=((area[1] + area[3]) + offset -2) + "px";*/
	dropdown.style.left=area[0]+174+"px";
	dropdown.style.top=((area[1])+8+ offset -2) + "px";
}


function closeIndexMenu(menu) {
	off(menu.getElementsByTagName('div').item(0));
	menu.getElementsByTagName('div').item(1).className='dropdown_hidden';
}