// Comprobación del Browser

function CompruebaBrowser() {

	var b = navigator.appName

	if (b=="Netscape") this.b = "ns"

	else if (b=="Microsoft Internet Explorer") this.b = "ie"

	else this.b = b

	this.version = navigator.appVersion

	this.v = parseInt(this.version)

	this.ns = (this.b=="ns" && this.v>=4)

	this.ns4 = (this.b=="ns" && this.v==4)

	this.ns5 = (this.b=="ns" && this.v==5)

	this.ie = (this.b=="ie" && this.v>=4)

	this.ie4 = (this.version.indexOf('MSIE 4')>0)

	this.ie5 = (this.version.indexOf('MSIE 5')>0)

	this.min = (this.ns||this.ie)

}

br = new CompruebaBrowser()



// Librería para manejar capas



function ObjetoCapa(id,antref,frame) {

	if (!br.ns5 && !ObjetoCapa.activa && !frame) IniciaCapas()

	this.frame = frame || self

	if (br.ns) {

		if (br.ns4) {

			if (!frame) {

				if (!antref) var antref = ObjetoCapa.antRefArray[id]

				if (!ProbarCapa(id,antref)) return

				this.css = (antref)? eval("document."+antref+".document."+id) : document.layers[id]

			}

			else this.css = (antref)? eval("frame.document."+antref+".document."+id) : frame.document.layers[id]

			this.elm = this.event = this.css

			this.doc = this.css.document

		}

		else if (br.ns5) {

			this.elm = document.getElementById(id)

			this.css = this.elm.style

			this.doc = document

		}

		this.x = this.css.left

		this.y = this.css.top

		this.w = this.css.clip.width

		this.h = this.css.clip.height

	}

	else if (br.ie) {

		this.elm = this.event = this.frame.document.all[id]

		this.css = this.frame.document.all[id].style

		this.doc = document

		this.x = this.elm.offsetLeft

		this.y = this.elm.offsetTop

		this.w = (br.ie4)? this.css.pixelWidth : this.elm.offsetWidth

		this.h = (br.ie4)? this.css.pixelHeight : this.elm.offsetHeight

	}

	this.posx=this.x

	this.posy=this.y

	this.id = id

	this.antref = antref

	this.obj = id + "ObjetoCapa"

	eval(this.obj + "=this")

// Funciones

this.inicializaDeslizar = CapaInicializaDeslizar

this.deslizarA = CapaDeslizarCapaA

this.deslizarDesde = CapaDeslizarCapaDesde

this.comenzarDeslizar = CapaComienzoDeslizar

this.deslizar = CapaDeslizar

this.enDeslizamiento = new Function()

this.enFinDeslizamiento = new Function()

this.moverA = CapaMoverA

this.moverDesde = CapaMoverDesde

this.mostrar = MostrarCapa

this.ocultar = OcultarCapa

this.clipInicializa = CapaClipInicializa

this.clipA = CapaClipA

this.clipDesde = CapaClipDesde

this.clipValores = CapaClipValores

this.escribe = EscribeCapa

this.clipAbajo = new Function;

this.clipArriba = new Function;

}

function CapaMoverA(x,y) {

	if (x!=null) {

		this.x = x

		if (br.ns) this.css.left = this.x

		else this.css.pixelLeft = this.x

	}

	if (y!=null) {

		this.y = y

		if (br.ns) this.css.top = this.y

		else this.css.pixelTop = this.y

	}

}

function CapaMoverDesde(x,y) {

	this.moverA(this.x+x,this.y+y)

}

function MostrarCapa() {

	this.css.visibility = (br.ns4)? "show" : "visible"

}

function OcultarCapa() {

	this.css.visibility = (br.ns4)? "hide" : "hidden"

}

ObjetoCapa.antRefArray = new Array()

ObjetoCapa.refArray = new Array()

ObjetoCapa.refArray.i = 0

ObjetoCapa.activa = false

ProbarCapa = new Function('return true')



// Inicializa Capas

function IniciaCapas(antref) {

	if (!ObjetoCapa.activa) ObjetoCapa.activa = true

	if (br.ns) {

		if (antref) ref = eval('document.'+antref+'.document')

		else {antref = ''; ref = document;}

		for (var i=0; i<ref.layers.length; i++) {

			var divname = ref.layers[i].name

			ObjetoCapa.antRefArray[divname] = antref

			var index = divname.indexOf("Div")

			if (index > 0) {

				eval(divname.substr(0,index)+' = new ObjetoCapa("'+divname+'","'+antref+'")')

			}

			if (ref.layers[i].document.layers.length > 0) {

				ObjetoCapa.refArray[ObjetoCapa.refArray.length] = (antref=='')? ref.layers[i].name : antref+'.document.'+ref.layers[i].name

			}

		}

		if (ObjetoCapa.refArray.i < ObjetoCapa.refArray.length) {

			IniciaCapas(ObjetoCapa.refArray[ObjetoCapa.refArray.i++])

		}

	}

	else if (br.ie) {

		for (var i=0; i<document.all.tags("DIV").length; i++) {

			var divname = document.all.tags("DIV")[i].id

			var index = divname.indexOf("Div")

			if (index > 0) {

				eval(divname.substr(0,index)+' = new ObjetoCapa("'+divname+'")')

			}

		}

	}

	return true

}





// Movimiento de capas

function CapaDeslizarCapaA(endx,endy,inc,vel,fn) {

	if (endx==null) endx = this.x

	if (endy==null) endy = this.y

	var distx = endx-this.x

	var disty = endy-this.y

	this.comenzarDeslizar(endx,endy,distx,disty,inc,vel,fn)

}

function CapaDeslizarCapaDesde(distx,disty,inc,vel,fn) {

	var endx = this.x + distx

	var endy = this.y + disty

	this.comenzarDeslizar(endx,endy,distx,disty,inc,vel,fn)

}

function CapaComienzoDeslizar(endx,endy,distx,disty,inc,vel,fn) {

	if (this.deslizamientoActivo) return

	if (!inc) inc = 10

	if (!vel) vel = 20

	var num = Math.sqrt(Math.pow(distx,2) + Math.pow(disty,2))/inc

	if (num==0) return

	var dx = distx/num

	var dy = disty/num

	if (!fn) fn = null

	this.deslizamientoActivo = true

	this.deslizar(dx,dy,endx,endy,num,1,vel,fn)

}

function CapaDeslizar(dx,dy,endx,endy,num,i,vel,fn) {

	if (!this.deslizamientoActivo) return

	if (i++ < num) {

		this.moverDesde(dx,dy)

		this.enDeslizamiento()

		if (this.deslizamientoActivo) setTimeout(this.obj+".deslizar("+dx+","+dy+","+endx+","+endy+","+num+","+i+","+vel+",\""+fn+"\")",vel)

		else this.enFinDeslizamiento()

	}

	else {

		this.deslizamientoActivo = false

		this.moverA(endx,endy)

		this.enDeslizamiento()

		this.enFinDeslizamiento()

		eval(fn)

	}

}

function CapaInicializaDeslizar() {}





// Ocultamos parte de la capa

function CapaClipInicializa(clipTop,clipRight,clipBottom,clipLeft) {

	if (br.ie) {

		if (arguments.length==4) this.clipTo(clipTop,clipRight,clipBottom,clipLeft)

		else if (br.ie4) this.clipTo(0,this.css.pixelWidth,this.css.pixelHeight,0)

	}

}

function CapaClipA(t,r,b,l) {

	if (t==null) t = this.clipValues('t')

	if (r==null) r = this.clipValues('r')

	if (b==null) b = this.clipValues('b')

	if (l==null) l = this.clipValues('l')

	if (br.ns) {

		this.css.clip.top = t

		this.css.clip.right = r

		this.css.clip.bottom = b

		this.css.clip.left = l

	}

	else if (br.ie) this.css.clip = "rect("+t+"px "+r+"px "+b+"px "+l+"px)"

}

function CapaClipDesde(t,r,b,l) {

	this.clipA(this.clipValores('t')+t,this.clipValores('r')+r,this.clipValores('b')+b,this.clipValores('l')+l)

}

function CapaClipValores(which) {

	if (br.ie) var clipv = this.css.clip.split("rect(")[1].split(")")[0].split("px")

	if (which=="t") return (br.ns)? this.css.clip.top : Number(clipv[0])

	if (which=="r") return (br.ns)? this.css.clip.right : Number(clipv[1])

	if (which=="b") return (br.ns)? this.css.clip.bottom : Number(clipv[2])

	if (which=="l") return (br.ns)? this.css.clip.left : Number(clipv[3])

}



// Escritura en capas

function EscribeCapa(texto) {

	if (br.ns) {

		this.doc.open()

		this.doc.write(texto)

		this.doc.close()

	}

	else if (br.ie) {

		this.event.innerHTML = texto

	}

}



// Funcion CSS para escribir estilos con una funcion

function css(id,left,top,width,height,color,vis,z,other) {

	if (id=="START") return '<STYLE TYPE="text/css">\n'

	else if (id=="END") return '</STYLE>'

	var texto = (left!=null && top!=null)? '#'+id+' {position:absolute; left:'+left+'px; top:'+top+'px;' : '#'+id+' {position:relative;'

	if (arguments.length>=4 && width!=null) texto += ' width:'+width+'px;'

	if (arguments.length>=5 && height!=null) {

		texto += ' height:'+height+'px;'

		if (arguments.length<9 || other.indexOf('clip')==-1) texto += ' clip:rect(0px '+width+'px '+height+'px 0px);'

	}

	if (arguments.length>=6 && color!=null) texto += (br.ns)? ' layer-background-color:'+color+';' : ' background-color:'+color+';'

	if (arguments.length>=7 && vis!=null) texto += ' visibility:'+vis+';'

	if (arguments.length>=8 && z!=null) texto += ' z-index:'+z+';'

	if (arguments.length==9 && other!=null) texto += ' '+other

	texto += '}\n'

	return texto

}

function escribeCSS(texto,muestraAlert) {

	texto = css('START')+texto+css('END')

	document.write(texto)

	if (muestraAlert) alert(texto)

}



function DesplegarMenu(tdesp,rdesp,bdesp,ldesp,tini,rini,bini,lini,tfin,rfin,bfin,lfin,velocidad) {

if ((bini>bfin && bdesp>0) || (bini<bfin && bdesp <0)) {return}

tini+=tdesp;

rini+=rdesp;

bini+=bdesp;

lini+=ldesp;

this.clipA(tini,rini,bini,lini);

setTimeout(this.obj+".clipAbajo("+tdesp+","+rdesp+","+bdesp+","+ldesp+","+tini+","+rini+","+bini+","+lini+","+tfin+","+rfin+","+bfin+","+lfin+","+velocidad+");",velocidad);

}