function toggleboxes(show){
    var showed = false;
	document.getElementById('textboxtop').style.display='none';
    
    if(show=="erectiemiddel"){
        if(document.getElementById(show).style.display=='none' || document.getElementById(show).style.display==''){
            document.getElementById(show).style.display='block';
			showed = true;
        } else {
            document.getElementById(show).style.display='none';
        }
    } else {
        document.getElementById('erectiemiddel').style.display='none';
    }
    
    if(show=="zaadproductie"){
        if(document.getElementById(show).style.display=='none' || document.getElementById(show).style.display==''){
            document.getElementById(show).style.display='block';
			showed = true;
        } else {
            document.getElementById(show).style.display='none';
        }
    } else {
        document.getElementById('zaadproductie').style.display='none';
    }
    
    if(show=="penisvergroting"){
        if(document.getElementById(show).style.display=='none' || document.getElementById(show).style.display==''){
            document.getElementById(show).style.display='block';
			showed = true;
        } else {
            document.getElementById(show).style.display='none';
        }
    } else {
        document.getElementById('penisvergroting').style.display='none';
    }
    
    if(show=="penisapparaat"){
        if(document.getElementById(show).style.display=='none' || document.getElementById(show).style.display==''){
            document.getElementById(show).style.display='block';
			showed = true;
        } else {
            document.getElementById(show).style.display='none';
        }
    } else {
        document.getElementById('penisapparaat').style.display='none';
    }
	 
    if(show=="gezondheid"){
        if(document.getElementById(show).style.display=='none' || document.getElementById(show).style.display==''){
            document.getElementById(show).style.display='block';
			showed = true;
        } else {
            document.getElementById(show).style.display='none';
        }
    } else {
        document.getElementById('gezondheid').style.display='none';
    }
    
    if(show=="lustverhogend"){
        if(document.getElementById(show).style.display=='none' || document.getElementById(show).style.display==''){
            document.getElementById(show).style.display='block';
			showed = true;
        } else {
            document.getElementById(show).style.display='none';
        }
    } else {
        document.getElementById('lustverhogend').style.display='none';
    }
    
    if(show=="vroegtijdigezaadlozing"){
            if(document.getElementById(show).style.display=='none' || document.getElementById(show).style.display==''){
                document.getElementById(show).style.display='block';
    			showed = true;
            } else {
                document.getElementById(show).style.display='none';
            }
        } else {
            document.getElementById('vroegtijdigezaadlozing').style.display='none';
    }
    
    if(show=="vitanu"){
                if(document.getElementById(show).style.display=='none' || document.getElementById(show).style.display==''){
                    document.getElementById(show).style.display='block';
        			showed = true;
                } else {
                    document.getElementById(show).style.display='none';
                }
            } else {
                document.getElementById('vitanu').style.display='none';
    }
    
    if (!showed){
		document.getElementById('textboxtop').style.display='block';
    }
}