function setclass(a)
{
	document.getElementById('map_bg').className = a;
}
window.onload = function ()
{
	document.getElementById('obl8').onmouseover = function(){setclass('obl8');}
	document.getElementById('obl8').onmouseout = function(){setclass('obl');}
	
	document.getElementById('obl7').onmouseover = function(){setclass('obl7');}
	document.getElementById('obl7').onmouseout = function(){setclass('obl');}
	
	document.getElementById('obl6').onmouseover = function(){setclass('obl6');}
	document.getElementById('obl6').onmouseout = function(){setclass('obl');}	
	
	document.getElementById('obl5').onmouseover = function(){setclass('obl5');}
	document.getElementById('obl5').onmouseout = function(){setclass('obl');}	
	
	document.getElementById('obl4').onmouseover = function(){setclass('obl4');}
	document.getElementById('obl4').onmouseout = function(){setclass('obl');}	
	
	document.getElementById('obl3').onmouseover = function(){setclass('obl3');}
	document.getElementById('obl3').onmouseout = function(){setclass('obl');}	
	
	document.getElementById('obl2').onmouseover = function(){setclass('obl2');}
	document.getElementById('obl2').onmouseout = function(){setclass('obl');}	
	
	document.getElementById('obl1').onmouseover = function(){setclass('obl1');}
	document.getElementById('obl1').onmouseout = function(){setclass('obl');}	
}