// Inicializa variables
var upH = 15;      // Height de flecha-up
var upW = 15;      // Width de flecha-up
var downH = 15;    // Height de flecha-down
var downW = 15;    // Width de flecha-down
var dragH = 9;    // Height del slider
var dragW = 17;    // Width del slider
var scrollH = 178; // Height de la barra de scroll
var speed = 4;     // Velocidad del scroll

// detector de browser
var dom = document.getElementById ? true:false;
var nn4 = document.layers ? true:false;
var ie4 = document.all ? true:false;

var mouseY; // Mouse Y position onclick
var mouseX; // Mouse X position onclick

var clickUp = false;    // Si cliquea en flecha-up
var clickDown = false;  // Si cliquea en flecha-down
var clickDrag = false;  // Si cliquea en la scrollbar
var clickAbove = false; // Si cliquea arriba de la scrollbar
var clickBelow = false; // Si cliquea abajo de la scrollbar

var timer = setTimeout("",500); // Timer
var upL;   // Up-arrow X
var upT;   // Up-arrow Y
var downL; // Down-arrow X
var downT; // Down-arrow Y
var dragL; // Scrollbar X
var dragT; // Scrollbar Y
var rulerL; // Ruler X
var rulerT; // Ruler Y
var contentT; // Content layer Y;
var contentH; // Content height
var contentClipH; // Content clip height
var scrollLength; // Number of pixels scrollbar should move
var startY; // Keeps track of offset between mouse and span

// Mousedown
function down(e){
	if((document.layers && e.which!=1) || (document.all && event.button!=1)) return true; 
	getMouse(e);
	startY = (mouseY - dragT);
	
	// If click on up-arrow
	if(mouseX >= upL && (mouseX <= (upL + upW)) && mouseY >= upT && (mouseY <= (upT + upH))){
		clickUp = true;
		return scrollUp();
	}	
	// Else if click on down-arrow
	else if(mouseX >= downL && (mouseX <= (downL + downW)) && mouseY >= downT && (mouseY <= (downT + downH))){
		clickDown = true;
		return scrollDown();
	}
	// Else if click on scrollbar
	else if(mouseX >= dragL && (mouseX <= (dragL + dragW)) && mouseY >= dragT && (mouseY <= (dragT + dragH))){
		clickDrag = true;
		return false;
	}
	else if(mouseX >= dragL && (mouseX <= (dragL + dragW)) && mouseY >= rulerT && (mouseY <= (rulerT + scrollH))){
		// If click above drag
		if(mouseY < dragT){
			clickAbove = true;
			clickUp = true;
			return scrollUp();
		}
		// Else click below drag
		else{
			clickBelow = true;
			clickDown = true;
			return scrollDown();
		}
	}
	// If no scrolling is to take place
	else{
		return true;
	}
}

// Fincion de drageo
function move(e){
	if(clickDrag && contentH > contentClipH){
		getMouse(e);
		dragT = (mouseY - startY);
		
		if(dragT < (rulerT))
			dragT = rulerT;		
		if(dragT > (rulerT + scrollH - dragH))
			dragT = (rulerT + scrollH - dragH);
		
		contentT = ((dragT - rulerT)*(1/scrollLength));
		contentT = eval('-' + contentT);

		moveTo();
		
		// So ie-pc doesn't select gifs
		if(ie4)
			return false;
	}

	// DESACTIVA SUBMENU

	 x = (is.ns)? e.pageX : event.x+document.body.scrollLeft
	 y = (is.ns)? e.pageY : event.y+document.body.scrollTop

	if (((y < 28) || (y > ymay) || (x < xmin) || (x > xmay)))
	{
		if(ie4){
			document.all[lyrant].style.visibility="hidden";
		}
		else if(nn4){
			document.layers[lyrant].visibility="hidden";
		}
		else if(dom){
			document.getElementById(lyrant).style.visibility = "hidden";
		}
	if ( xout == 1 & lyrant != ('SubMenu'+NroSeccion)){
		out('Img'+lyrant);
		xout = 0;
		}
	}

	// FIN DESACTIVA SUBMENU //
}

function up(){
	clearTimeout(timer);
	// Resetting variables
	clickUp = false;
	clickDown = false;
	clickDrag = false;
	clickAbove = false;
	clickBelow = false;
	return true;
}

// Reads content layer top
function getT(){
	if(ie4)
		contentT = document.all.content.style.pixelTop;
	else if(nn4)
		contentT = document.contentClip.document.content.top;
	else if(dom)
		contentT = parseInt(document.getElementById("content").style.top);
}

// Lee las coordenadas X , Y del mouse
function getMouse(e){
	if(ie4){
		mouseY = event.clientY + document.body.scrollTop;
		mouseX = event.clientX + document.body.scrollLeft;
	}
	else if(nn4 || dom){
		mouseY = e.pageY;
		mouseX = e.pageX;
	}
}

// Moves the layer
function moveTo(){
	if(ie4){
		document.all.content.style.top = contentT;
		document.all.ruler.style.top = dragT;
		document.all.drag.style.top = dragT;
	}
	else if(nn4){
		document.contentClip.document.content.top = contentT;
		document.ruler.top = dragT;
		document.drag.top = dragT;
	}
	else if(dom){
		document.getElementById("content").style.top = contentT + "px";
		document.getElementById("drag").style.top = dragT + "px";
		document.getElementById("ruler").style.top = dragT + "px";
	}
}

// Scrolls up
function scrollUp(){
	getT();
	
	if(clickAbove){
		if(dragT <= (mouseY-(dragH/2)))
			return up();
	}
	
	if(clickUp){
		if(contentT < 0){		
			dragT = dragT - (speed*scrollLength);
			
			if(dragT < (rulerT))
				dragT = rulerT;
				
			contentT = contentT + speed;
			if(contentT > 0)
				contentT = 0;
			
			moveTo();
			timer = setTimeout("scrollUp()",25);
		}
	}
	return false;
}

// Scrolls down
function scrollDown(){
	getT();
	
	if(clickBelow){
		if(dragT >= (mouseY-(dragH/2)))
			return up();
	}

	if(clickDown){
		if(contentT > -(contentH - contentClipH)){			
			dragT = dragT + (speed*scrollLength);
			if(dragT > (rulerT + scrollH - dragH))
				dragT = (rulerT + scrollH - dragH);
			
			contentT = contentT - speed;
			if(contentT < -(contentH - contentClipH))
				contentT = -(contentH - contentClipH);
			
			moveTo();
			timer = setTimeout("scrollDown()",25);
		}
	}
	return false;
}

// reloads page to position the layers again
function reloadPage(){
	location.reload();
}

// Preload
function eventLoader(){
	if(ie4){
		// Up-arrow X and Y variables
		upL = document.all.up.style.pixelLeft;
		upT = document.all.up.style.pixelTop;
		// Down-arrow X and Y variables
		downL = document.all.down.style.pixelLeft;
		downT = document.all.down.style.pixelTop;
		// Scrollbar X and Y variables
		dragL = document.all.drag.style.pixelLeft;
		dragT = document.all.drag.style.pixelTop;		
		// Ruler Y variable
		rulerT = document.all.ruler.style.pixelTop;		
		// Height of content layer and clip layer
		contentH = parseInt(document.all.content.scrollHeight);
		contentClipH = parseInt(document.all.contentClip.style.height);
	}
	else if(nn4){
		// Up-arrow X and Y variables
		upL = document.up.left;
		upT = document.up.top;		
		// Down-arrow X and Y variables
		downL = document.down.left;
		downT = document.down.top;		
		// Scrollbar X and Y variables
		dragL = document.drag.left;
		dragT = document.drag.top;		
		// Ruler Y variable
		rulerT = document.ruler.top;
		// Height of content layer and clip layer
		contentH = document.contentClip.document.content.clip.bottom;
		contentClipH = document.contentClip.clip.bottom;
	}
	else if(dom){
		// Up-arrow X and Y variables
		upL = parseInt(document.getElementById("up").style.left);
		upT = parseInt(document.getElementById("up").style.top);
		// Down-arrow X and Y variables
		downL = parseInt(document.getElementById("down").style.left);
		downT = parseInt(document.getElementById("down").style.top);
		// Scrollbar X and Y variables
		dragL = parseInt(document.getElementById("drag").style.left);
		dragT = parseInt(document.getElementById("drag").style.top);
		// Ruler Y variable
		rulerT = parseInt(document.getElementById("ruler").style.top);
		// Height of content layer and clip layer
		contentH = parseInt(document.getElementById("content").offsetHeight);
		contentClipH = parseInt(document.getElementById("contentClip").offsetHeight);
		document.getElementById("content").style.top = 0 + "px";
		
	}
	// Number of pixels scrollbar should move
	scrollLength = ((scrollH-dragH)/(contentH-contentClipH));
	// Initializes event capturing
	if(nn4){
		document.captureEvents(Event.MOUSEDOWN | Event.MOUSEMOVE | Event.MOUSEUP);
		window.onresize = reloadPage;
	}
	document.onmousedown = down;
	document.onmousemove = move;
	document.onmouseup = up;
//	document.onmousemove = mouseMove;
}

// MOUSE OVER DE LOS ELEMENTOS DEL SCROLL

var status = 1;
var scrolltoc = new Array();

function scrollitem(off, over){
	this.off = new Image(); this.off.src = off;
	this.over = new Image(); this.over.src = over;
}
function scrollcache(id, off, over){
	scrollitem[id] = new scrollitem(off, over);
	scrolltoc[scrolltoc.length] = id;
}
function scrollover(id,Lyr){
	if (document.all){
		document[id].src = scrollitem[id].over.src;
	} else {
		document.layers[Lyr].document[id].src = scrollitem[id].over.src;
	}
	
}
function scrollout(id,Lyr){
	if (document.all){	
		document[id].src = scrollitem[id].off.src;
	} else {
		document.layers[Lyr].document[id].src = scrollitem[id].off.src;
	}
}
scrollcache("imgup", "../imgs/comunes/scroll_up.gif", "../imgs/comun/scroll_up2.gif");
scrollcache("imgdn", "../imgs/comunes/scroll_dn.gif", "../imgs/comun/scroll_dn2.gif");
scrollcache("imgsl", "../../imgs/drag.gif", "../../imgs/drag_over.gif");

// SCRIPT SUBMENU - TIENE OTRA PARTE EN EL move(e) //

// VARIABLES //
// VARIABLES //
	var lyrant = 'SubMenu1';
	var xmin = 260;
	var xmay = 780;
	var ymay = 108;
	var ymin = 28;
	var xout = 0;

// CAPTURA PUNTERO MOUSE //
	function Is() {
		var agent = navigator.userAgent.toLowerCase();
		this.major = parseInt(navigator.appVersion);
		this.minor = parseFloat(navigator.appVersion);
		this.ns  = ((agent.indexOf('mozilla')!=-1) && ((agent.indexOf('spoofer')==-1) && (agent.indexOf('compatible') == -1)));
		this.ns2 = (this.ns && (this.major == 3));
		this.ns3 = (this.ns && (this.major == 3));
		this.ns4 = (this.ns && (this.major >= 4));
		this.ie   = (agent.indexOf("msie") != -1);
		this.ie3  = (this.ie && (this.major == 2));
		this.ie4  = (this.ie && (this.major >= 4));
		this.op3 = (agent.indexOf("opera") != -1);
	}

	var is = new Is();

	function ver(lyr){
		if(ie4){
			document.all[lyrant].style.visibility="hidden";
			document.all[lyr].style.visibility="visible";
		}
		else if(nn4){
			document.layers[lyrant].visibility="hidden";
			document.layers[lyr].visibility="visible";
		}
		else if(dom){
			document.getElementById(lyrant).style.visibility = "hidden";
			document.getElementById(lyr).style.visibility = "visible";
		}
		if (lyrant != ('SubMenu' + NroSeccion)){out('Img'+lyrant);}
		if (lyr != ('SubMenu' + NroSeccion)){over('Img'+lyr);}
		lyrant=lyr;
		xout = 1;
	}