/**
* ÆÄÀϸí: lib.rollover.js
* ¼³  ¸í: ·Ñ¿À¹ö ÀÚµ¿È­ ¶óÀ̺귯¸®
* ÀÛ¼ºÀÚ: jstoy project
* ³¯  Â¥: 2003-11-01
*
* 2002-11-05: °ÅÄ£¸¶·ç
* 2003-10-24: xtac.net
* 2003-10-29: laintt
* 2003-10-30: ÇູÇÑ °í´Ï
***********************************************
*/

Roll = function() {
    this.outMark    = "_off";
    this.overMark   = "_on";
    this.selectMark = "_sel";
    if (!document.body.getAttribute) return false;
    this.outSearch= new RegExp(this.outMark + "(\.[^\.]+)$");
    this.imgs = document.images;
    if (document.getElementsByTagName) {
        for (var i=0, s=document.getElementsByTagName("input").length; i<s; i++)
            this.imgs[this.imgs.length] = document.getElementsByTagName("input")[i];
    }
    this.init();
}
Roll.prototype.init = function() {
    var classObj = this;
    var preload = new Array;
    for (var i=0, s=this.imgs.length; i<s; i++) {
        this.imgs[i].setAttribute("orgsrc", this.imgs[i].src);
        if (this.imgs[i].getAttribute("oversrc") || this.imgs[i].getAttribute("roll")!==null) {
            if (!this.imgs[i].getAttribute("oversrc")) this.imgs[i].setAttribute("oversrc", this.imgs[i].src.replace(this.outSearch, this.overMark+"$1"));
            if (this.imgs[i].getAttribute("oversrc")==this.imgs[i].src) continue;
            var preload_next = preload.length;
            preload[preload_next] = new Image;
            preload[preload_next].src = this.imgs[i].getAttribute("oversrc");
            this.imgs[i].overAction = this.imgs[i].onmouseover;
            this.imgs[i].outAction  = this.imgs[i].onmouseout;
            this.imgs[i].onmouseover= function() {classObj.doOver(this);}
            this.imgs[i].onmouseout = function() {classObj.doOut(this);}
        }
        if (this.imgs[i].getAttribute("group")!=null) {
            if (!this.imgs[i].getAttribute("selsrc")) this.imgs[i].getAttribute("selsrc", this.imgs[i].src.replace(this.outSearch, this.selectMark+"$1"));
            var preload_next = preload.length;
            preload[preload_next] = new Image;
            preload[preload_next].src = this.imgs[i].getAttribute("selsrc");
            if (this.imgs[i].getAttribute("selected")) {
                this.imgs[i].setAttribute("fl_select", 1);
                this.imgs[i].src = this.imgs[i].getAttribute("selsrc");
            }
            this.imgs[i].clickAction = this.imgs[i].onclick;
            this.imgs[i].onclick     = function() {classObj.doClick(this);}
        }
    }
}
Roll.prototype.doOver = function(img) {
    if(img.getAttribute("fl_select") != 1) img.src = img.getAttribute("oversrc");
    if(typeof(img.overAction) != 'undefined') img.overAction();
}
Roll.prototype.doOut = function(img) {
    if(img.getAttribute("fl_select") != 1) img.src = img.getAttribute("orgsrc");
    if(typeof(img.outAction) != 'undefined') img.outAction();
}
Roll.prototype.doClick = function(img) {
    for (var i=0, s=this.imgs.length; i<s; i++) {
        if (this.imgs[i].getAttribute("group") == img.getAttribute("group") && this.imgs[i].getAttribute("fl_select") == 1) {
            this.imgs[i].setAttribute("fl_select", 0);
            this.imgs[i].src = this.imgs[i].getAttribute("orgsrc");
        }
    }
    img.setAttribute("fl_select", 1);
    img.src = img.getAttribute("selsrc");
    if(typeof(img.clickAction) != 'undefined') img.clickAction();
}