// 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)
}