// 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 DynLayerMoveTo(x,y) { 
if (x!=null) { 
this.x = x 
if (is.ns) this.css.left = this.x 
else this.css.pixelLeft = this.x 
} 
if (y!=null) { 
this.y = y 
if (is.ns) this.css.top = this.y 
else this.css.pixelTop = this.y 
} 
} 
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 
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 

// 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) { 
if (is.ie) { 
if (arguments.length==4) this.clipTo(clipTop,clipRight,clipBottom,clipLeft) 
else if (is.ie4) this.clipTo(0,this.css.pixelWidth,this.css.pixelHeight,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') 
if (is.ns) { 
this.css.clip.top = t 
this.css.clip.right = r 
this.css.clip.bottom = b 
this.css.clip.left = l 
} 
else if (is.ie) 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) { 
if (is.ie) var clipv = this.css.clip.split("rect(")[1].split(")")[0].split("px") 
if (which=="t") return (is.ns)? this.css.clip.top : Number(clipv[0]) 
if (which=="r") return (is.ns)? this.css.clip.right : Number(clipv[1]) 
if (which=="b") return (is.ns)? this.css.clip.bottom : Number(clipv[2]) 
if (which=="l") return (is.ns)? 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) { 
if (is.ns) { 
this.doc.open() 
this.doc.write(html) 
this.doc.close() 
} 
else if (is.ie) { 
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);' 
} 
if (arguments.length>=6 && color!=null) str += (is.ns)? ' 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) 
}