// xp_progressbar
// Copyright 2004 Brian Gosselin of ScriptAsylum.com
//
// v1.0 - Initial release
// v1.1 - Added ability to pause the scrolling action (requires you to assign
//        the bar to a unique arbitrary variable).
//      - Added ability to specify an action to perform after a x amount of
//      - bar scrolls. This requires two added arguments.
// v1.2 - Added ability to hide/show each bar (requires you to assign the bar
//        to a unique arbitrary variable).

// var xyz = createBar(
// total_width,
// total_height,
// background_color,
// border_width,
// border_color,
// block_color,
// scroll_speed,
// block_count,
// scroll_count,
// action_to_perform_after_scrolled_n_times
// )

var w3c=(document.getElementById)?true:false;
var ie=(document.all)?true:false;
var N=-1;

function createBar(w,h,bgc,brdW,brdC,blkC,speed,blocks,count,action) {
    if(ie||w3c) {
        var t='<div id="_xpbar'+(++N)+'" style="visibility:visible; position:relative; overflow:hidden; width:'+w+'px; height:'+h+'px; background-color:'+bgc+'; border-color:'+brdC+'; border-width:'+brdW+'px; border-style:solid; font-size:1px;">';
        t+='<span id="blocks'+N+'" style="left:-'+(h*2+1)+'px; position:absolute; font-size:1px">';
        for(i=0;i<blocks;i++) {
            t+='<span style="background-color:'+blkC+'; left:-'+((h*i)+i)+'px; font-size:1px; position:absolute; width:'+h+'px; height:'+h+'px; '
            t+=(ie)?'filter:alpha(opacity='+(100-i*(100/blocks))+')':'-Moz-opacity:'+((100-i*(100/blocks))/100);
            t+='"></span>';
        }
        t+='</span></div>';
        document.write(t);
        var bA=(ie)?document.all['blocks'+N]:document.getElementById('blocks'+N);
        bA.bar=(ie)?document.all['_xpbar'+N]:document.getElementById('_xpbar'+N);
        bA.blocks=blocks;
        bA.N=N;
        bA.w=w;
        bA.h=h;
        bA.speed=speed;
        bA.ctr=0;
        bA.count=count;
        bA.action=action;
        bA.togglePause=togglePause;
        bA.showBar=function() {
            this.bar.style.visibility="visible";
        }
        bA.hideBar=function() {
            this.bar.style.visibility="hidden";
        }
        bA.tid=setInterval('startBar('+N+')',speed);
        return bA;
    }
}

function startBar(bn){
    var t=(ie)?document.all['blocks'+bn]:document.getElementById('blocks'+bn);
    if (parseInt(t.style.left)+t.h+1-(t.blocks*t.h+t.blocks)>t.w) {
        t.style.left=-(t.h*2+1)+'px';
        t.ctr++;
        if (t.ctr>=t.count){
            eval(t.action);
            t.ctr=0;
        }
    } else t.style.left=(parseInt(t.style.left)+t.h+1)+'px';
}

function togglePause() {
    if (this.tid==0) {
        this.tid=setInterval('startBar('+this.N+')',this.speed);
        } else {
        clearInterval(this.tid);
        this.tid=0;
    }
}

function togglePause() {
    if (this.tid==0) {
        this.tid=setInterval('startBar('+this.N+')',this.speed);
        } else {
        clearInterval(this.tid);
        this.tid=0;
    }
}