function init_stroom(myMaskWidth,speed_1,speed_2,speed_3) { 
	preloadProducts();	
	stroomInterval = 100;
	maskWidth = myMaskWidth;
	project = new Array();
	project[1] = next_project();
	project[2] = next_project();
	project[3] = next_project();
	projectX = new Array();
	projectX[1] = -32;
	projectX[2] = 150;
	projectX[3] = 400;
	projectStatus = new Array();
	projectStatus[1] = "active";
	projectStatus[2] = "active";
	projectStatus[3] = "active";
	projectSpeed = new Array();
	projectSpeed[1] = speed_1;
	projectSpeed[2] = speed_2;
	projectSpeed[3] = speed_3;

	document.projectLayer = new Array();
	document.projectLayer[1] = new Array();
	document.projectLayer[1].laag = (isNS4) ? document.uitsnedestroom.document.stroom1 : document.all.stroom1 ;
	document.projectLayer[1].prop = (isNS4) ? document.uitsnedestroom.document.stroom1 : document.all.stroom1.style ;
	document.projectLayer[1].obj =  (isNS4) ? document.uitsnedestroom.document.stroom1.document.stroomobject1 : document.all.stroomobject1 ;
	document.projectLayer[2] = new Array();
	document.projectLayer[2].laag = (isNS4) ? document.uitsnedestroom.document.stroom2 : document.all.stroom2 ;
	document.projectLayer[2].prop = (isNS4) ? document.uitsnedestroom.document.stroom2 : document.all.stroom2.style ;
	document.projectLayer[2].obj =  (isNS4) ? document.uitsnedestroom.document.stroom2.document.stroomobject2 : document.all.stroomobject2 ;
	document.projectLayer[3] = new Array();
	document.projectLayer[3].laag = (isNS4) ? document.uitsnedestroom.document.stroom3 : document.all.stroom3 ;
	document.projectLayer[3].prop = (isNS4) ? document.uitsnedestroom.document.stroom3 : document.all.stroom3.style ;
	document.projectLayer[3].obj =  (isNS4) ? document.uitsnedestroom.document.stroom3.document.stroomobject3 : document.all.stroomobject3 ;

	eval("document.projectLayer[1].obj.src = product['" + project[1] + "'].src");
	eval("document.projectLayer[2].obj.src = product['" + project[2] + "'].src");
	eval("document.projectLayer[3].obj.src = product['" + project[3] + "'].src");

	(isNS4) ? document.uitsnedestroom.document.stroom1.visibility = "show" : document.all.stroom1.style.visibility = "visible";
	(isNS4) ? document.uitsnedestroom.document.stroom2.visibility = "show" : document.all.stroom2.style.visibility = "visible";
	(isNS4) ? document.uitsnedestroom.document.stroom3.visibility = "show" : document.all.stroom3.style.visibility = "visible";

	moveStroom1();
}

function update_stroom() { 
	eval("document.projectLayer[1].obj.src = product['" + project[1] + "'].src");
	eval("document.projectLayer[2].obj.src = product['" + project[2] + "'].src");
	eval("document.projectLayer[3].obj.src = product['" + project[3] + "'].src");
}

function next_project() { 
	huidigProductID += 1;
    if (huidigProductID >= product.length) huidigProductID %= product.length;
    return (huidigProductID);
}

function project_link(n) {
	eval ("location = product[" + project[n] + "].link");
}

function stroom_start(n) { 
	projectStatus[n]="active";
}

function stroom_stop(n) { 
	eval ("status = product[" + project[n] + "].naam");
	projectStatus[n] = "idle";
}

function moveStroom1() { 
	if (projectStatus[1] == "active") {
		var myLayerX = projectX[1];
		if (myLayerX >= maskWidth) {
			myLayerX = myLayerX - (maskWidth + 32);
			project[1] = next_project();
			eval("document.projectLayer[1].obj.src = product['" + project[1] + "'].src");
		} else if (myLayerX <= -40) {
			myLayerX = maskWidth;
			project[1] = next_project();
			eval("document.projectLayer[1].obj.src = product['" + project[1] + "'].src");
		}
		document.projectLayer[1].prop.left = myLayerX + projectSpeed[1];
		projectX[1] = myLayerX + projectSpeed[1];
	}
	(isMac && !isNS4) ? setTimeout("moveStroom2()",100) : moveStroom2();
}

function moveStroom2() { 
	if (projectStatus[2] == "active") {
		var myLayerX = projectX[2];
		if (myLayerX >= maskWidth) {
			myLayerX = myLayerX - (maskWidth + 32);
			project[2] = next_project();
			eval("document.projectLayer[2].obj.src = product['" + project[2] + "'].src");
		} else if (myLayerX <= -40) {
			myLayerX = maskWidth;
			project[2] = next_project();
			eval("document.projectLayer[2].obj.src = product['" + project[2] + "'].src");
		}
		document.projectLayer[2].prop.left = myLayerX + projectSpeed[2];
		projectX[2] = myLayerX + projectSpeed[2];
	}
	(isMac && !isNS4) ? setTimeout("moveStroom3()",100) : moveStroom3();
}

function moveStroom3() { 
	if (projectStatus[3] == "active") {
		var myLayerX = projectX[3];
		if (myLayerX >= maskWidth) {
			myLayerX = myLayerX - (maskWidth + 32);
			project[3] = next_project();
			eval("document.projectLayer[3].obj.src = product['" + project[3] + "'].src");
		} else if (myLayerX <= -40) {
			myLayerX = maskWidth;
			project[3] = next_project();
			eval("document.projectLayer[3].obj.src = product['" + project[3] + "'].src");
		}
		document.projectLayer[3].prop.left = myLayerX + projectSpeed[3];
		projectX[3] = myLayerX + projectSpeed[3];
	}
	setTimeout("moveStroom1()",stroomInterval);
}