function showTab(which) {
	
	if(which == 'ondernemers_best') {
		var divToShow = document.getElementById('ondernemers_best');
		var divToHide = document.getElementById('ondernemers_meest');
	} else {
		var divToShow = document.getElementById('ondernemers_meest');
		var divToHide = document.getElementById('ondernemers_best');
	}
	divToShow.className = 'showTab';
	divToHide.className = 'hiddenTab';
	
}

function showTab2(which) {
	
	if(which == 'overig_nieuws') {
		var divToShow = document.getElementById('overig_nieuws');
		var divToHide = document.getElementById('meest_gelezen');
	} else {
		var divToShow = document.getElementById('meest_gelezen');
		var divToHide = document.getElementById('overig_nieuws');
	}
	divToShow.className = 'showTab2';
	divToHide.className = 'hiddenTab2';
	
}

function showTab3(which) {
	
	if(which == 'howto_gelezen') {
		var divToShow = document.getElementById('howto_gelezen');
		var divToHide = document.getElementById('howto_besproken');
	} else {
		var divToShow = document.getElementById('howto_besproken');
		var divToHide = document.getElementById('howto_gelezen');
	}
	divToShow.className = 'showTab';
	divToHide.className = 'hiddenTab';
	
}

function showTab4(which) {
	
	if(which == 'netwerk_geplaatst') {
		var divToShow = document.getElementById('netwerk_geplaatst');
		var divToHide = document.getElementById('netwerk_besproken');
	} else {
		var divToShow = document.getElementById('netwerk_besproken');
		var divToHide = document.getElementById('netwerk_geplaatst');
	}
	divToShow.className = 'showTab';
	divToHide.className = 'hiddenTab';
	
}

function foldMenu(id) {
	
	hetElement = document.getElementById(id);
	
	var elements = getElementsByClassName('foldMenuOpen');
	
	if(hetElement.className == 'foldMenuOpen') {
		hetElement.className = 'foldMenuClosed';
		
		for(i=0;i<elements.length;i++) {
			elements[i].className = 'foldMenuClosed';
		}
	} else {
		hetElement.className = 'foldMenuOpen';
		
		for(i=0;i<elements.length;i++) {
			elements[i].className = 'foldMenuClosed';
		}
	}
	
}

function faq_foldMenu(id) {
	
	hetElement = document.getElementById(id);
	
	var elements = getElementsByClassName('faq_foldMenuOpen');
	
	if(hetElement.className == 'faq_foldMenuOpen') {
		hetElement.className = 'faq_foldMenuClosed';
		
		for(i=0;i<elements.length;i++) {
			elements[i].className = 'faq_foldMenuClosed';
		}
	} else {
		hetElement.className = 'faq_foldMenuOpen';
		
		for(i=0;i<elements.length;i++) {
			elements[i].className = 'faq_foldMenuClosed';
		}
	}
	
}

function getElementsByClassName(className, tag, elm) {
    var testClass = new RegExp("(^|\\s)" + className + "(\\s|$)");
    var tag = tag || "*";
    var elm = elm || document;
    var elements = tag == "*" && elm.all ? elm.all : elm.getElementsByTagName(tag);
    var returnElements = [];
    var current;
    var length = elements.length;
    for (var i = 0; i < length; i++) {
        current = elements[i];
        if (testClass.test(current.className)) {
            returnElements.push(current);
        }
    }
    return returnElements;
}