// 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;
		}
	}