function changeOpac(opacity, id) {
	var object = document.getElementById(id).style;
	object.opacity = (opacity / 100);
	object.MozOpacity = (opacity / 100);
	object.KhtmlOpacity = (opacity / 100);
	object.filter = "alpha(opacity=" + opacity + ")";
}

function blendimage(divid, imageid, imagefile, millisec) {
	var speed = Math.round(millisec / 100);
	var timer = 0;
	
	document.getElementById(divid).style.backgroundImage = "url(" + document.getElementById(imageid).src + ")";
	
	changeOpac(0, imageid);
	
	document.getElementById(imageid).src = imagefile;

	for(i = 0; i <= 100; i++) {
		setTimeout("changeOpac(" + i + ",'" + imageid + "')",(timer * speed));
		timer++;
	}
}

function blenden() {
	/*cur++;
	if(cur == 19) {
		cur -= 18;
	}*/
	cur = Math.round(Math.random()*3) + 1;
	blendimage('blenddiv','blendimage', 'images/heefthulp' + cur + '.jpg',1000);
	setTimeout("blenden()",10000);
}



	function rollover(knop, url) {
		knop.src = "images/menu_pchulp.com_" + url + "_over.jpg";
	}
	function rollout(knop, url) {
		knop.src = "images/menu_pchulp.com_" + url + ".jpg";
	}
	
	function setOpacity(obj,value) {
		if(value >= 7) {
			obj.style.opacity = "";
			obj.style.filter = "";
		}
		else {
			obj.style.opacity = value/10;
			obj.style.filter = 'alpha(opacity=' + value*10 + ')';
		}
	}
	
	function toggle(divname) {
		/*alert(document.getElementById("info_content").style.height);
			alert(document.getElementById("diensten_content").style.height);
		alert(document.getElementById("prijzen_content").style.height);
		alert(document.getElementById("contact_content").style.height);*/
	
			document.getElementById("menu_home").className = "";
			document.getElementById("menu_actie").className = "";
			document.getElementById("menu_media").className = "";
			document.getElementById("menu_initiatiefnemers").className = "";

		if(divname!="home" && (document.getElementById("home_content").style.height!="0px" && document.getElementById("home_content").style.height!="1px" && document.getElementById("home_content").style.height!="")) {
			slide_home.start();
		}
		if(divname!="actie" && (document.getElementById("actie_content").style.height!="0px" && document.getElementById("actie_content").style.height!="1px" && document.getElementById("actie_content").style.height!="")) {
			slide_actie.start();
		}
		if(divname!="media" && (document.getElementById("media_content").style.height!="0px" && document.getElementById("media_content").style.height!="1px" && document.getElementById("media_content").style.height!="")) {
			slide_media.start();
		}
		if(divname!="initiatiefnemers" && (document.getElementById("initiatiefnemers_content").style.height!="0px" && document.getElementById("initiatiefnemers_content").style.height!="1px" && document.getElementById("initiatiefnemers_content").style.height!="")) {
			slide_initiatiefnemers.start();
		}
		
		if(divname=="home") {
			slide_home.start();
			document.getElementById("menu_" + divname).className = "active";	
		}
		if(divname=="actie") {
			slide_actie.start();
			document.getElementById("menu_" + divname).className = "active";	
		}
		if(divname=="media") {
			slide_media.start();
			document.getElementById("menu_" + divname).className = "active";	
		}
		if(divname=="initiatiefnemers") {
			slide_initiatiefnemers.start();
			document.getElementById("menu_" + divname).className = "active";	
		}

		if(divname=="home" && (document.getElementById("home_content").style.height!="0px" && document.getElementById("home_content").style.height!="")) {
			document.getElementById("menu_" + divname).className = "";	
		}
		if(divname=="actie" && (document.getElementById("actie_content").style.height!="0px" && document.getElementById("actie_content").style.height!="")) {
			document.getElementById("menu_" + divname).className = "";	
		}
		if(divname=="media" && (document.getElementById("media_content").style.height!="0px" && document.getElementById("media_content").style.height!="")) {
			document.getElementById("menu_" + divname).className = "";	
		}
		if(divname=="initiatiefnemers" && (document.getElementById("initiatiefnemers_content").style.height!="0px" && document.getElementById("initiatiefnemers_content").style.height!="")) {
			document.getElementById("menu_" + divname).className = "";	
		}
}
/*
	function toggle(divname) {
		if(divname!="info" && document.getElementById("info_content").style.display=="block") {
			hide("info");
		}
		if(divname!="diensten" && document.getElementById("diensten_content").style.display=="block") {
			hide("diensten");
		}
		if(divname!="prijzen" && document.getElementById("prijzen_content").style.display=="block") {
			hide("prijzen");
		}
		if(divname!="contact" && document.getElementById("contact_content").style.display=="block") {
			hide("contact");
		}
		
		if(document.getElementById(divname + "_content").style.display=="block") {
			hide(divname);
		}
		else {
			show(divname);
		}
	}
*/
	function show(divname) {
		document.getElementById(divname + "_content").style.display="block";
		//toggleSlide(divname + "_content");
		document.getElementById("menu_" + divname).className = "active";
	}
	function hide(divname) {
		document.getElementById(divname + "_content").style.display="none";
		//toggleSlide(divname + "_content");
		document.getElementById("menu_" + divname).className = "";
	}
	
	function show2(divname) {
		div = document.getElementById(divname + "_content");
		height = 0;
		maxheight = 200;
		if(divname == "info") {
			maxheight = 268;
		}
		if(divname == "diensten") {
			maxheight = 220;
		}
		if(divname == "prijzen") {
			maxheight = 220;
		}
		if(divname == "contact") {
			maxheight = 220;
		}
		timeint = 500;
		timestep = 10;
		step = maxheight / (timeint / timestep);
		
		div.style.display = "block";
		
		groter(divname,height,maxheight,step,timestep,0);
	}

	function hide2(divname) {
		div = document.getElementById(divname + "_content");
		maxheight = 200;
		height = maxheight;
		timeint = 500;
		timestep = 10;
		step = maxheight / (timeint / timestep);
		
		div.style.display = "block";
		
		kleiner(divname,height,maxheight,step,timestep,0);
	}
	
	function groter(divname,height,maxheight,step,timestep,i) {
		div = document.getElementById(divname + "_content");
		div.style.height = height + "px";
		setOpacity(div, 10 * (height / maxheight));
		i++;
		if(height <= maxheight) {
			setTimeout("groter('" + divname + "'," + (step * i) + "," + maxheight + "," + step + "," + timestep + "," + i + ");", (timestep / timeint) * timeint);
		}
	}

	function kleiner(divname,height,maxheight,step,timestep,i) {
		div = document.getElementById(divname + "_content");
		div.style.height = height + "px";
		setOpacity(div, 10 * (height / maxheight));
		i++;
		if(height > 0) {
			setTimeout("kleiner('" + divname + "'," + (maxheight - (step * i)) + "," + maxheight + "," + step + "," + timestep + "," + i + ");", (timestep / timeint) * timeint);
		}
		else {
			div.style.height="0px";
			div.style.display="none";
		}
	}