// 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();
// 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);
}