// 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/

// updated 20011228 by Bob Clary <bc@bclary.com>
// to support Gecko

function DynLayer(id,nestref,frame) {
        //bc:maybe? if (!is.ns5 && !DynLayer.set && !frame) DynLayerInit()
        if (!DynLayer.set && !frame) DynLayerInit()
        this.frame = frame || self
        //bc:if (is.ns) {
        if (is.ns4) {
                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
                }
                //bc:else if (is.ns5) {
                //bc:        this.elm = document.getElementById(id)
                //bc:        this.css = this.elm.style
                //bc:        this.doc = document
                //bc: }
                this.x = this.css.left
                this.y = this.css.top
                this.w = this.css.clip.width
                this.h = this.css.clip.height
        }
        //bc:else if (is.ie) {
        else if (is.ie || is.ns5) {
    //bc:
    if (is.ie)
                this.elm = this.event = this.frame.document.all[id]
    //bc:
    else
                this.elm = this.event = this.frame.document.getElementById(id)

                //bc:this.css = this.frame.document.all[id].style
                this.css = this.elm.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 DynLayerMoveTo(x,y) {
        if (x!=null) {
                this.x = x
                //bc:if (is.ns) this.css.left = this.x
                if (is.ns4) this.css.left = this.x
                //bc:else this.css.pixelLeft = this.x
                else if (is.ie) this.css.pixelLeft = this.x
                else if (is.ns5) this.css.left = Math.floor(this.x) + 'px'
        }
        if (y!=null) {
                this.y = y
                //bc:if (is.ns) this.css.top = this.y
                if (is.ns4) this.css.top = this.y
                //bc:else this.css.pixelTop = this.y
                else if (is.ie) this.css.pixelTop = this.y
                else if (is.ns5) this.css.top = Math.floor(this.y) + 'px'
        }
}
function DynLayerMoveBy(x,y) {
        this.moveTo(this.x+x,this.y+y)
}
function DynLayerShow() {
        this.css.visibility = (is.ns4)? "show" : "visible"
}
function DynLayerHide() {
        this.css.visibility = (is.ns4)? "hide" : "hidden"
}
DynLayer.prototype.moveTo = DynLayerMoveTo
DynLayer.prototype.moveBy = DynLayerMoveBy
DynLayer.prototype.show = DynLayerShow
DynLayer.prototype.hide = DynLayerHide
DynLayerTest = new Function('return true')

// DynLayerInit Function
function DynLayerInit(nestref) {
        if (!DynLayer.set) DynLayer.set = true
        //bc:if (is.ns) {
        if (is.ns4) {
                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+'")')
                        }
                }
        }
  //bc:
        else if (is.ns5) {
    var nodeList = document.getElementsByTagName('div');
                for (var i=0; i<nodeList.length; i++) {
                        var divname = nodeList[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

// Slide Methods
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
        if (!inc) inc = 10
        if (!speed) speed = 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.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)
                this.onSlide()
                if (this.slideActive) setTimeout(this.obj+".slide("+dx+","+dy+","+endx+","+endy+","+num+","+i+","+speed+",\""+fn+"\")",speed)
                else this.onSlideEnd()
        }
        else {
                this.slideActive = false
                this.moveTo(endx,endy)
                this.onSlide()
                this.onSlideEnd()
                eval(fn)
        }
}
function DynLayerSlideInit() {}
DynLayer.prototype.slideInit = DynLayerSlideInit
DynLayer.prototype.slideTo = DynLayerSlideTo
DynLayer.prototype.slideBy = DynLayerSlideBy
DynLayer.prototype.slideStart = DynLayerSlideStart
DynLayer.prototype.slide = DynLayerSlide
DynLayer.prototype.onSlide = new Function()
DynLayer.prototype.onSlideEnd = new Function()

// Clip Methods
function DynLayerClipInit(clipTop,clipRight,clipBottom,clipLeft) {
        //bc:if (is.ie) {
        if (is.ie||is.ns5) {
                if (arguments.length==4) this.clipTo(clipTop,clipRight,clipBottom,clipLeft)
                else if (is.ie4) this.clipTo(0,this.css.pixelWidth,this.css.pixelHeight,0)
    //bc:
                else if (is.ns5) this.clipTo(0,this.elm.offsetWidth,this.elm.offsetHeight,0)
        }
}
function DynLayerClipTo(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')
        //bc:if (is.ns) {
        if (is.ns4) {
                this.css.clip.top = t
                this.css.clip.right = r
                this.css.clip.bottom = b
                this.css.clip.left = l
        }
        //bc:else if (is.ie) this.css.clip = "rect("+t+"px "+r+"px "+b+"px "+l+"px)"
        else if (is.ie||is.ns5) this.css.clip = "rect("+t+"px "+r+"px "+b+"px "+l+"px)"
}
function DynLayerClipBy(t,r,b,l) {
        this.clipTo(this.clipValues('t')+t,this.clipValues('r')+r,this.clipValues('b')+b,this.clipValues('l')+l)
}
function DynLayerClipValues(which) {
        //bc:if (is.ie) var clipv = this.css.clip.split("rect(")[1].split(")")[0].split("px")
        if (is.ie||is.ns5) var clipv = this.css.clip.split("rect(")[1].split(")")[0].split("px")
        //bc:if (which=="t") return (is.ns)? this.css.clip.top : Number(clipv[0])
        if (which=="t") return (is.ns4)? this.css.clip.top : Number(clipv[0])
        //bc:if (which=="r") return (is.ns)? this.css.clip.right : Number(clipv[1])
        if (which=="r") return (is.ns4)? this.css.clip.right : Number(clipv[1])
        //bc:if (which=="b") return (is.ns)? this.css.clip.bottom : Number(clipv[2])
        if (which=="b") return (is.ns4)? this.css.clip.bottom : Number(clipv[2])
        //bc:if (which=="l") return (is.ns)? this.css.clip.left : Number(clipv[3])
        if (which=="l") return (is.ns4)? this.css.clip.left : Number(clipv[3])
}
DynLayer.prototype.clipInit = DynLayerClipInit
DynLayer.prototype.clipTo = DynLayerClipTo
DynLayer.prototype.clipBy = DynLayerClipBy
DynLayer.prototype.clipValues = DynLayerClipValues

// Write Method
function DynLayerWrite(html) {
        //bc:if (is.ns) {
        if (is.ns4) {
                this.doc.open()
                this.doc.write(html)
                this.doc.close()
        }
        //bc:else if (is.ie) {
        else if (is.ie||is.ns5) {
                this.event.innerHTML = html
        }
}
DynLayer.prototype.write = DynLayerWrite

// 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()

// CSS Function
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 str = (left!=null && top!=null)? '#'+id+' {position:absolute; left:'+left+'px; top:'+top+'px;' : '#'+id+' {position:relative;'
        if (arguments.length>=4 && width!=null) str += ' width:'+width+'px;'
        if (arguments.length>=5 && height!=null) {
                str += ' height:'+height+'px;'
                if (arguments.length<9 || other.indexOf('clip')==-1) str += ' clip:rect(0px '+width+'px '+height+'px 0px);'
        }
        //bc:if (arguments.length>=6 && color!=null) str += (is.ns)? ' layer-background-color:'+color+';' : ' background-color:'+color+';'
        if (arguments.length>=6 && color!=null) str += (is.ns4)? ' layer-background-color:'+color+';' : ' background-color:'+color+';'
        if (arguments.length>=7 && vis!=null) str += ' visibility:'+vis+';'
        if (arguments.length>=8 && z!=null) str += ' z-index:'+z+';'
        if (arguments.length==9 && other!=null) str += ' '+other
        str += '}\n'
        return str
}
function writeCSS(str,showAlert) {
        str = css('START')+str+css('END')
        document.write(str)
        if (showAlert) alert(str)
}