/**
	 * Copyright (c) 2009 by saltcake
	 * All rights reserved.
	 *
	 * 자바스크립트 공통함수
	 *	 
	 * @version 1.0, 2009/07/06
	 * @author 
	 */
	var context = "/skcc";
	/* ==== png file ==== */
	
	function setPng24(obj) {
		obj.width=obj.height=1;
		obj.className=obj.className.replace(/\bpng24\b/i,'');
		obj.style.filter =
		"progid:DXImageTransform.Microsoft.AlphaImageLoader(src='"+ obj.src +"',sizingMethod='image');"
		obj.src=''; 
		return '';
	}

	/* ==== scroll top control ==== */

	

	

	/* ==== slider nameSpace ==== */
	var slider = function() {
		/* ==== private methods ==== */
		function getElementsByClass(object, tag, className) {
			var o = object.getElementsByTagName(tag);
			for ( var i = 0, n = o.length, ret = []; i < n; i++) {
				if (o[i].className == className) ret.push(o[i]);
			}
			if (ret.length == 1) ret = ret[0];
			return ret;
		}
		function setOpacity (obj,o) {
			alert(obj);
			if (obilters) obj.filters.alpha.opacity = Math.round(o);
			else obj.style.opacity = o / 50;
		}
		
		
		/* ==== Slider Constructor ==== */
		function Slider(oCont, speed, iW, iH, oP) {
			this.slides = [];
			this.over   = true;//first over
			this.S      = this.S0 = speed;
			this.iW     = iW;
			this.iH     = iH;
			this.oP     = oP;
			this.oc     = document.getElementById(oCont);
			this.frm    = getElementsByClass(this.oc, 'div', 'slide');
			this.NF     = this.frm.length;
			this.resize();
			for (var i = 0; i < this.NF; i++) {
				this.slides[i] = new Slide(this, i);
			}
			this.oc.parent = this;
			this.view      = this.slides[0];
			this.Z         = this.mx;
			/* ==== on mouse out event ==== */
			/*
			this.oc.onmouseout = function () {
				this.parent.mouseout();
				return false;
			}
			*/
		}
		Slider.prototype = {
			/* ==== animation loop ==== */
			run : function () {
				this.Z += this.over ? (this.mn - this.Z) * .5 : (this.mx - this.Z) * .5;
				this.view.calc();
				var i = this.NF;
				while (i--) this.slides[i].move();
			},
			/* ==== resize  ==== */
			resize : function () {
				this.wh = this.oc.clientWidth;
				this.ht = this.oc.clientHeight;
				this.wr = this.wh * this.iW;
				this.r  = this.ht / this.wr;
				this.mx = this.wh / this.NF;
				this.mn = (this.wh * (1 - this.iW)) / (this.NF - 1);
			},
			/* ==== rest  ==== */
			mouseout : function () {
				this.over      = true;//false; 100503
				//setOpacity(this.view.img, this.oP);
				//setOpacity(this.view.img, 100);//100503
			}
		}
		/* ==== Slide Constructor ==== */
		Slide = function (parent, N) {
			this.parent = parent;
			this.N      = N;
			this.x0     = this.x1 = N * parent.mx;
			this.v      = 0;
			this.loaded = false;
			this.cpt    = 0;
			this.start  = new Date();
			this.obj    = parent.frm[N];
			this.txt    = getElementsByClass(this.obj, 'div', 'text');
			this.img    = getElementsByClass(this.obj, 'img', 'diapo');
			this.bkg    = document.createElement('div');
			this.bkg.className = 'backgroundText';
			this.obj.insertBefore(this.bkg, this.txt);
			if (N == 0) this.obj.style.borderLeft = 'none';
			//this.obj.style.left = Math.floor(this.x0) + 'px';
			//setOpacity(this.img, parent.oP);
			//setOpacity(this.img, 100);
			/* ==== mouse events ==== */
			this.obj.parent = this;
			this.obj.onmouseover = function() {
				this.parent.over();
				return false;
			}
		}
		Slide.prototype = {
			/* ==== target positions ==== */
			calc : function() {
				var that = this.parent;
				// left slides
				for (var i = 0; i <= this.N; i++) {
					that.slides[i].x1 = i * that.Z;
				}
				// right slides
				for (var i = this.N + 1; i < that.NF; i++) {
					that.slides[i].x1 = that.wh - (that.NF - i) * that.Z;
				}
			},
			/* ==== HTML animation : move slides ==== */
			move : function() {
				var that = this.parent;
				var s = (this.x1 - this.x0) / that.S;
				/* ==== lateral slide ==== */
				if (this.N && Math.abs(s) > .1) {
					this.obj.style.left = Math.floor(this.x0 += s) + 'px';
				}
				/* ==== vertical text ==== */
				var v = (this.N < that.NF - 1) ? that.slides[this.N + 1].x0 - this.x0 : that.wh - this.x0;
				if (Math.abs(v - this.v) > .5) {
					this.bkg.style.top = this.txt.style.top = Math.floor(2 + that.ht - (v - that.Z) * that.iH * that.r) + 'px';
					this.v = v;
					this.cpt++;
				} else {
					if (!this.pro) {
						/* ==== adjust speed ==== */
						this.pro = true;
						var tps = new Date() - this.start;
						if(this.cpt > 1) {
							that.S = Math.max(15, (15 / (tps / this.cpt)) * that.S0);
						}
					}
				}
				if (!this.loaded) {
					if (this.img.complete) {
						this.img.style.visibility = 'visible';
						this.loaded = true;
					}
				}
			},
			/* ==== light ==== */
			over : function () {
				this.parent.resize();
				this.parent.over = true;
				//setOpacity(this.parent.view.img, this.parent.oP);
				//setOpacity(this.parent.view.img, 100); //100503
				this.parent.view = this;
				this.start = new Date();
				this.cpt = 0;
				this.pro = false;
				this.calc();
				//setOpacity(this.img, 100);
			}
		}
		/* ==== public method - script initialization ==== */
		return {
			init : function() {
				// create instances of sliders here
				// parameters : HTMLcontainer name, speed (2 fast - 20 slow), Horizontal ratio, vertical text ratio, opacity
				this.s1 = new Slider("slider", 20, 2.44/3.292, 10/3.2, 70);
				setInterval("slider.s1.run();", 4);
			}
		}
	}();