function S(a){document.getElementById(a).style.display='block';}
function H(a){document.getElementById(a).style.display='none';}
function SWAP(a,b){S(a);H(b);}
function SH(a){with(document.getElementById(a).style){display=display=='none'?'block':'none'}}
function expand(what) {
	(document.getElementById(what).style.display == 'none') ? document.getElementById(what).style.display = 'block' : document.getElementById(what).style.display = 'none';
	
	
	if(document.getElementById(what+'_arr').src.match(/img\/arr_c.png.*?/))
	{
	 	document.getElementById(what+'_arr').src = 'img/arr_o.png'; 
	}
	else
	{
		document.getElementById(what+'_arr').src = 'img/arr_c.png';
	}
	
	
	return false;
}