function slideFolio(col, first, last){
	if(col > first){
		prev = col-1;	
	}
	if(col < last){
		next = col+1;			
	}
	for (j=1;j<=last;j++){
		document.getElementById("rijnr" + j).style.textDecoration='none'; 
	}
	
	document.getElementById("rijnr" + col).style.textDecoration='underline';
	
	var x = ((col-1)*-390)
	var folioChange = new Fx.Tween('folio', {duration:1200});
	folioChange.start('left',x);		
	var cur = "trigger"+col;		
	$(cur).addClass('current');	
	for (i=1;i<=8;i++){
		var loopLI = "trigger"+i;
		if (cur==loopLI){}else{
			$(loopLI).removeClass('current');
		}
	}
}


function bgChange(img, cat, pos){
	document.getElementById("beeld_big").style.background = 'url(beelden/' + cat + '/' + img + ') ' + pos + ' no-repeat';
}

function checkselected(div){
	if(document.getElementById(div + "_check").className == "uncheck"){
		document.getElementById(div + "_check").className = "check";
		document.getElementById(div + "_send").value = "yes";

	} else {
		document.getElementById(div + "_check").className = "uncheck";
		document.getElementById(div + "_send").value = "";
	}
		
}