// Dynamic Layer Object
// sophisticated layer/element targeting and animation object which provides the core functionality needed in most DHTML applications
// 19990604

// Copyright (C) 1999 Dan Steinman
// Distributed under the terms of the GNU Library General Public License
// Available at http://www.dansteinman.com/dynapi/

function DynLayer(id,nestref,frame) {
        if (!is.ns5 && !DynLayer.set && !frame) DynLayerInit()
        this.frame = frame || self
        if (is.ns) {
                if (is.ns4) {
                        if (!frame) {
                                if (!nestref) var nestref = DynLayer.nestRefArray[id]
                                if (!DynLayerTest(id,nestref)) return
                                this.css = (nestref)? eval("document."+nestref+".document."+id) : document.layers[id]
                        }
                        else this.css = (nestref)? eval("frame.document."+nestref+".document."+id) : frame.document.layers[id]
                        this.elm = this.event = this.css
                        this.doc = this.css.document
                }
                else if (is.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 (is.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 = (is.ie4)? this.css.pixelWidth : this.elm.offsetWidth
                this.h = (is.ie4)? this.css.pixelHeight : this.elm.offsetHeight
        }
        this.id = id
        this.nestref = nestref
        this.obj = id + "DynLayer"
        eval(this.obj + "=this")
}

function DynLayerShow() {
        this.css.visibility = (is.ns4)? "show" : "visible"
}
function DynLayerHide() {
        this.css.visibility = (is.ns4)? "hide" : "hidden"
}
DynLayer.prototype.show = DynLayerShow
DynLayer.prototype.hide = DynLayerHide
DynLayerTest = new Function('return true')

// DynLayerInit Function
function DynLayerInit(nestref) {
        if (!DynLayer.set) DynLayer.set = true
        if (is.ns) {
                if (nestref) ref = eval('document.'+nestref+'.document')
                else {nestref = ''; ref = document;}
                for (var i=0; i<ref.layers.length; i++) {
                        var divname = ref.layers[i].name
                        DynLayer.nestRefArray[divname] = nestref
                        var index = divname.indexOf("Div")
                        if (index > 0) {
                                eval(divname.substr(0,index)+' = new DynLayer("'+divname+'","'+nestref+'")')
                        }
                        if (ref.layers[i].document.layers.length > 0) {
                                DynLayer.refArray[DynLayer.refArray.length] = (nestref=='')? ref.layers[i].name : nestref+'.document.'+ref.layers[i].name
                        }
                }
                if (DynLayer.refArray.i < DynLayer.refArray.length) {
                        DynLayerInit(DynLayer.refArray[DynLayer.refArray.i++])
                }
        }
        else if (is.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 DynLayer("'+divname+'")')
                        }
                }
        }
        return true
}
DynLayer.nestRefArray = new Array()
DynLayer.refArray = new Array()
DynLayer.refArray.i = 0
DynLayer.set = false


// BrowserCheck Object
function BrowserCheck() {
        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)
}
is = new BrowserCheck()