function ShowHideDivs(show,hide){
	var obj_divnaam = document.getElementById(hide);
	obj_divnaam.style.display='none';
	
	var obj_divnaam = document.getElementById(show);
	obj_divnaam.style.display='block';
}

function ShowHide(divnaam,aktie,force_select,other_div){
	var obj_divnaam = document.getElementById(divnaam);
	obj_divnaam.style.display=aktie;
	
	if (aktie == "block"){
		hideHTMLElement('select');
		
		/*for forcing to show the selectboxes on the advanced search form*/
		if (force_select == "force_select"){
			var obj_divnaam = document.getElementById(divnaam);
			obj_divnaam.style.visibility='visible';
			
			/*internet has 2 selectboxes (risbis has 1 selectbox), so this is for internet*/
			if (other_div != ""){
				var obj_divnaam = document.getElementById(other_div);
				obj_divnaam.style.visibility='visible';
			}
		}		
		
	}else{
		showHTMLElement('select');
	}
}