var linkBestellenAangeklikt = false;
function checkBestellenAangeklikt() {
	if (linkBestellenAangeklikt) {
		return false;
	} else {
		linkBestellenAangeklikt = true;
		return true;
	}
}


function laagzichtbaar(strLayer, strImage) {
	var varLayer = getLayer(strLayer);
	if (varLayer) {
		varLayer.visibility = 'visible';
	}
}

function laagnietzichtbaar(strLayer, strImage) {
	var varLayer = getLayer(strLayer);
	varLayer.visibility = 'hidden';
}

function getLayer(name) {
	if (document.getElementById) {
		if (document.getElementById(name)) {
			return document.getElementById(name).style;
		} else {
			return false;
		}
	} else if (document.all) {
		return document.all[name].style;
	} else if (document.layers) {
		return document.layers[name];
	}
}

function shiftOpacity(id, millisec) { 
	//if an element is invisible, make it visible, else make it ivisible 
	if(document.getElementById(id).style.opacity == 0) { 
		opacity(id, 0, 100, millisec); 
	} else { 
		opacity(id, 100, 0, millisec);
	}
}

function opacity(id, opacStart, opacEnd, millisec) { 
	//speed for each frame 
	var speed = Math.round(millisec / 100); 
	var timer = 0; 

	//determine the direction for the blending, if start and end are the same nothing happens 
	if(opacStart > opacEnd) { 
		for(i = opacStart; i >= opacEnd; i--) { 
			setTimeout("changeOpac(" + i + ",'" + id + "')",(timer * speed)); 
			timer++; 
			i--;
		} 
	} else if(opacStart < opacEnd) { 
		for(i = opacStart; i <= opacEnd; i++) { 
			setTimeout("changeOpac(" + i + ",'" + id + "')",(timer * speed)); 
			timer++;
			i++;
		}
	}
}

//change the opacity for different browsers 
function changeOpac(opacity, id) {
	if (opacity != 100) {
		var object = document.getElementById(id).style;
		object.opacity = (opacity / 100);
		object.MozOpacity = (opacity / 100);
		object.KhtmlOpacity = (opacity / 100);
		object.filter = "alpha(opacity=" + opacity + ")";
	}
/*
	if (id == "homepage_rechts_tekst_default") {
		document.getElementById("fade0").innerHTML = document.getElementById("fade0").innerHTML + " " + document.getElementById("homepage_rechts_tekst_default").style.opacity;
	} else if (id == "homepage_rechts_tekst_industrial") {
		document.getElementById("fade1").innerHTML = document.getElementById("fade1").innerHTML + " " + document.getElementById("homepage_rechts_tekst_industrial").style.opacity;
	} else if (id == "homepage_rechts_tekst_promotional") {
		document.getElementById("fade2").innerHTML = document.getElementById("fade2").innerHTML + " " + document.getElementById("homepage_rechts_tekst_promotional").style.opacity;
	} else if (id == "homepage_rechts_tekst_medical") {
		document.getElementById("fade3").innerHTML = document.getElementById("fade3").innerHTML + " " + document.getElementById("homepage_rechts_tekst_medical").style.opacity;
	}
*/
}


/* MENU FUNCTIONS */
$(document).ready(function() {
	$('ul li.submenu a').each(function() {
		if ($(this).parent().children('ul').length == 1) {
			$(this).bind('click', function(evt) {
				$(this).parent().children('ul').toggle();

				return false;
			});
		}
	});

//	$('ul.HoofdNavigatie ul').hide();
});