/********************************************************
 This JavaScript code uses techniques found at
 The Dynamic Duo - http://www.dansteinman.com/dynduo/

 Edited by Howard Chen
 Get more JavaScripts at http://members.xoom.com/7432/
 Bugs report to hchen007@geocities.com
 This script is free as long as the credits above is kept
 ********************************************************/

image_used = "../imagen/elemento/trasgu_paracaidista_pq.gif";   // Filename of the image
width_of_image = 100;
height_of_image = 100;

//=============== DO NOT EDIT BELOW THIS LINE ================
ns4 = (document.layers)? true:false
ie4 = (document.all)? true:false

function onerror() {
	location.href="javascript:"
}

function DynLayer(id,nestref) {
	if (ns4) {
		this.css = (nestref)? eval("document."+nestref+".document."+id) : document.layers[id]
		this.x = this.css.left
		this.y = this.css.top
		}
	else if (ie4) {
		this.css = document.all[id].style
		this.x = this.css.pixelLeft
		this.y = this.css.pixelTop
		}
	this.show = DynLayerShow
	this.hide = DynLayerHide
	this.addon = DynLayerAddon
	this.addon(id,nestref)
}

function DynLayerMoveTo(x,y) {
	if (x!=null) {
		this.x = x
		this.css.left = this.x
		}
	if (y!=null) {
		this.y = y
		this.css.top = this.y
	}
}

function DynLayerMoveBy(x,y) {
	this.moveTo(this.x+x,this.y+y)
}

function DynLayerShow() {
	this.css.visibility = (ns4)? "show" : "visible"
}

function DynLayerHide() {
	this.css.visibility = (ns4)? "hide" : "hidden"
}

function DynLayerAddon(id,nestref) {
	this.id = id
	this.nestref = nestref
	this.w = (ns4)? this.css.clip.width : this.css.pixelWidth
	this.h = (ns4)? this.css.clip.height : this.css.pixelHeight
	this.doc = (ns4)? this.css.document : document
	this.event = (ns4)? this.css : document.all[id]
	this.obj = id + "DynLayer"
	eval(this.obj + "=this")
	this.moveTo = DynLayerMoveTo
	this.moveBy = DynLayerMoveBy
	this.slideTo = DynLayerSlideTo
	this.slideBy = DynLayerSlideBy
	this.slideStart = DynLayerSlideStart
	this.slide = DynLayerSlide
}

function DynLayerSlideTo(endx,endy,inc,speed,fn) {
	if (endx==null) endx = this.x
	if (endy==null) endy = this.y
	var distx = endx-this.x
	var disty = endy-this.y
	this.slideStart(endx,endy,distx,disty,inc,speed,fn)
}

function DynLayerSlideBy(distx,disty,inc,speed,fn) {
	var endx = this.x + distx
	var endy = this.y + disty
	this.slideStart(endx,endy,distx,disty,inc,speed,fn)
}

function DynLayerSlideStart(endx,endy,distx,disty,inc,speed,fn) {
	if (this.slideActive) return
	var num = Math.sqrt(Math.pow(distx,2) + Math.pow(disty,2))/inc
	var dx = distx/num
	var dy = disty/num
	if (!fn) fn = null
	this.slideActive = true
	this.slide(dx,dy,endx,endy,num,1,speed,fn)
}

function DynLayerSlide(dx,dy,endx,endy,num,i,speed,fn) {
	if (!this.slideActive) return
	if (i++ < num) {
		this.moveBy(dx,dy)
		setTimeout(this.obj+".slide("+dx+","+dy+","+endx+","+endy+","+num+","+i+","+speed+",\""+fn+"\")",speed)
		}
	else {
		this.slideActive = false
		this.moveTo(endx,endy)
		eval(fn)
		}
}

function createLayer(id,nestref,left,top,width,height,content,bgColor,visibility,zIndex) {
	if (ns4) {
    	if (nestref) {
        	var lyr = eval("document."+nestref+".document."+id+" = new Layer(width, document."+nestref+")")
			}
		else {
			var lyr = document.layers[id] = new Layer(width)
			eval("document."+id+" = lyr")
			}
		lyr.left = left
		lyr.top = top
		if (height!=null) lyr.clip.height = height
		if (bgColor!=null) lyr.bgColor = bgColor
		lyr.visibility = (visibility=='hidden')? 'hide' : 'show'
		if (zIndex!=null) lyr.zIndex = zIndex
		if (content) {
			lyr.document.open()
			lyr.document.write(content)
			lyr.document.close()
			}
		}
	else if (ie4) {
		var str = '\n<div id='+id+' style="position:absolute; left:'+left+'; top:'+top+'; width:'+width
		if (height!=null) {
			str += '; height:'+height
			str += '; clip:rect(0,'+width+','+height+',0)'
			}
		if (bgColor!=null) str += '; background-color:'+bgColor         
		if (zIndex!=null) str += '; z-index:'+zIndex
		if (visibility) str += '; visibility:'+visibility
		str += ';">'+((content)?content:'')+'</DIV>'
		if (nestref) {
			index = nestref.lastIndexOf(".")
			var nestlyr = (index != -1)? nestref.substr(index+1) : nestref
			document.all[nestlyr].insertAdjacentHTML("BeforeEnd",str);
			}
		else {
			document.body.insertAdjacentHTML("BeforeEnd",str)
			}
		}
}

function init() {
	if (ns4 || ie4) {
		document.onmousemove = mouseMove
		if (ns4) document.captureEvents(Event.MOUSEMOVE)
		createLayer("cursorDiv",null,-1*(width_of_image),-1*(height_of_image),width_of_image,height_of_image,"<img src=" + image_used + ">",null,null,0);
		cursor = new DynLayer("cursorDiv");
		}
}

function mouseMove(e) {
	var x = (ns4)? e.pageX : event.x
	var y = (ns4)? e.pageY : event.y+document.body.scrollTop
	cursor.moveTo(x+1,y+1);
}