function changeContentHeight() {
	var pageHeight = 0;
	
	if(self.innerWidth) {
		pageHeight = self.innerHeight;
	} else if(document.documentElement && document.documentElement.clientHeight) {
		pageHeight = document.documentElement.clientHeight;
	} else if(document.body) {
		pageHeight = document.body.clientHeight;
	} else return;
	
	var contentHeight = pageHeight - (document.getElementById('header').offsetHeight + document.getElementById('hoofdmenu').offsetHeight + document.getElementById('footer').offsetHeight);
	document.getElementById('content').style.minHeight = contentHeight + 'px';
	
	// Check what browser
	var details = navigator.userAgent;
	if(details.indexOf("MSIE") != -1) {
		var IE = details.substring(details.indexOf("MSIE") + 5, details.indexOf("MSIE") + 6);
		if(IE == "6")
			document.getElementById('content').style.height = contentHeight + 'px';
	}
}

function toggleLinkerMenuCategorie(link, cat_id) {
	if(!document.getElementById('subcategorie_' + cat_id))
		return;
	
	var parent = document.getElementById('subcategorie_' + cat_id);
	if(parent.style.display == 'none') {
		parent.style.display = '';
		link.style.fontWeight = 'bold';
	}
	else {
		parent.style.display = 'none';
		link.style.fontWeight = 'normal';
	}
}

function addProductToCart(prd_id) {
	document.location.href = "php/winkelwagen.php?actie=toevoegen&prd_id=" + prd_id;
}