// 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 {
         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.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+'")')
            }
         }
      }
   else {
      var divs = document.getElementsByTagName('div');
      for (var i=0; i<divs.length; i++) {
         var divname = divs[i].id;
         if (divname)
            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 Browser() {
   var agent = navigator.userAgent.toLowerCase();
   this.version=navigator.appVersion;
   this.major = parseInt(navigator.appVersion);
   this.minor = parseFloat(navigator.appVersion);
   this.ns = (
      (agent.indexOf('mozilla') != -1) && (
         (agent.indexOf('spoofer') == -1) &&
         (agent.indexOf('compatible') == -1)
         )
      );
   this.ns4 = (this.ns && (this.major == 4));
   this.ns6 = (this.ns && (this.major >= 5));
   this.ie = (agent.indexOf("msie") != -1);
   this.ie3 = (this.ie && (this.major < 4));
   this.ie4 = (this.ie && (this.major == 4) && 
      (agent.indexOf("msie 5.0") == -1));
   this.ie5 = (this.ie && (this.major == 4) &&
      (agent.indexOf("msie 5.0") != -1));
   this.ie55 = (this.ie && (this.major == 4) &&
      (agent.indexOf("msie 5.5") != -1));
   this.ie6 = (this.ie && (agent.indexOf("msie 6.0")!=-1) );
   this.safari = (agent.indexOf("safari")!=-1);
   this.opera = (agent.indexOf("opera") != -1);

   if (agent.indexOf("win")>-1)
      this.platform="win32";
   else if (agent.indexOf("mac")>-1)
      this.platform="mac";
   else
      this.platform="other";

   var b=navigator.appName;
   if (this.safari)
      this.b = 'safari';
   else if (this.opera)
      this.b = 'opera';
   else if (this.ns)
      this.b = 'ns';
   else if (this.ie)
      this.b = 'ie';

   this.dom = (
      document.createElement &&
      document.appendChild &&
      document.getElementsByTagName)?true:false;
   this.def=(this.ie||this.dom); // most used browsers, for faster if loops
   }


is=new Browser();

// 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)
}