/***************************************************************************
* Internet Explorer Margin Fix
* Copyright 2002 by David Schontzler | www.stilleye.com
* Free to use under GNU General Public License as long as this message
*  remains intact.
* Description:  This script will fix the horizontal margin support in IE5/6
***************************************************************************
* Version: 1.2.beta
***************************************************************************/

if(!Array.prototype.push) // for ie5.x
{
	Array.prototype.push =  function()
	{
		var i, j;
		for(i=0; j=arguments[i]; i++) this[this.length] = j;
		return this.length;
	}
}

IEmarginFix =
{
	list : new Array(),
	
	init : function()
	{
		var ua = navigator.userAgent.toLowerCase();
		if( (ua.indexOf("msie 5.") != -1 || ua.indexOf("msie 6.") != -1) && ua.indexOf('mac') == -1 && document.compatMode != "CSS1Compat" && window.attachEvent && document.all && document.getElementsByTagName )
		{
			var ss = document.styleSheets, auto, lop, list, s, i, a;
			auto = new Array();
			lop = new Array();
			list = new Array();
			s = this.getRules();
			
			for(i=0; i<s.length; i++)
			{
				if( this.checkMargin(s[i][1]) )
					auto.push(s[i][0]);
				else if( this.checkLopsided(s[i][1]) )
					lop.push(s[i][0]);
			}
			
			for(i=0; a = auto[i]; i++)
				ss[ss.length-1].addRule(a, "position : relative; left : expression( ( (this.parentNode.clientWidth > 0 ? this.parentNode.clientWidth : this.parentNode.offsetWidth) - this.offsetWidth) / 2);");
			
			for(i=0; a = lop[i]; i++)
				ss[ss.length-1].addRule(a, "position : relative; left : expression("
				+ "( (this.parentNode.clientWidth > 0 ? this.parentNode.clientWidth : this.parentNode.offsetWidth) - this.offsetWidth)"
				+ " - (this.currentStyle.marginRight.indexOf('px') > 0 ? parseInt(this.currentStyle.marginRight) : "
				+ "parseInt(this.currentStyle.marginRight) * .01 * (this.parentNode.clientWidth > 0 ? this.parentNode.clientWidth : this.parentNode.offsetWidth) )"
				+ "- ( parseInt(this.parentNode.currentStyle.paddingLeft) + parseInt(this.parentNode.currentStyle.paddingRight) )"
				+ ");");

			this.list = auto.length > 0 ? lop.length > 0 ? auto.concat(lop) : auto : lop;
			
			window.attachEvent("onload", IEmarginFix.checkInline);
		}
	},
	
	checkInline : function()
	{
		var i, a, elm, blk, list = new Array(), auto = IEmarginFix.list;
		for(i=0; a = auto[i]; i++)
		{
			if( a.indexOf(".") != -1 ) // classes
				list = list.concat( IEmarginFix.getClass( a.substring(a.indexOf(".")+1) ) );
			else if( a.charAt(0) == '#' ) // ids
				list.push( document.all[a.substring(1)] );
			else // tags
			{
				elm = document.getElementsByTagName(a);
				if(elm.length > 0)
					for(i=0; i < elm.length; i++)
						list = list.concat( elm.item(i) );
			}
		}
		
		for(i=0; i<list.length; i++)
		{
			elm = list[i];
			if(elm && elm.style)
			{
				blk = IEmarginFix.getStyle(elm, "display");
				if(blk != "block" && ( IEmarginFix.ie50 ? !IEmarginFix.ie50check(elm.tagName) : blk != "list-item" ) )
				{
					elm.style.position = "static";
					elm.style.left = "auto";
				}
			}
		}
	},
	
	checkMargin : function(str)
	{
		return (
			str.match(/margin\s*:\s*auto(;|$)/i) || str.match(/margin\s*:\s*\S+\s+auto(;|$)/i)
			|| ( str.match(/margin-left\s*:\s*auto/i) && str.match(/margin-right\s*:\s*auto/i) )
			|| str.match(/margin\s*:\s*\S+\s+auto\s+\S+(;|$)/i) || str.match(/margin\s*:\s*\S+\s+auto\s+\S+\s+auto/i)
		);
	},
	
	checkLopsided : function(str)
	{
		return (
			str.match(/margin-left\s*:\s*auto/i) && str.match(/margin-right\s*:\s*\d+(px|%)?/i)
			|| str.match(/margin-left\s*:\s*auto/i) && !str.match(/margin-right/i)
		);
	},
	
	/* these next few methods are basically for IE 5.0's bad interpretation of the "display" property
	(always returning "inline" unless explicitly set, even for block elements! */
	
	ie50 : navigator.appVersion.toLowerCase().indexOf("msie 5.0") != -1,
	
	ie50check : function(tag)
	{
		var i, r = false;
		tag = tag.toUpperCase();
		for(i=0; i<this.blockElms.length; i++)
			if(tag == this.blockElms[i])
				r = true;
		return r;
	},
	
	blockElms : new Array("ADDRESS", "BLOCKQUOTE", "BODY", "CENTER", "COL", "COLGROUP", "DD", "DIR", "DIV", "DL", "DT", "FIELDSET", "FORM", "FRAME", "HN", "HR", "IFRAME", "LEGEND", "LI", "LISTING", "MARQUEE", "MENU", "OL", "P", "PLAINTEXT", "PRE", "TABLE", "TBODY", "TD", "TFOOT", "TH", "THEAD", "TR", "UL", "XMP"),
	
	/* end IE5.0 detect */
	
	getClass : function(cls)
	{
		var el, r, i;
		el = document.all ? document.all : document.getElementsByTagName('*');
		r = new Array();
		for(i=0; el[i]; i++) if(el[i].className == cls) r.push(el[i]);
		if(r.length==0) r = null;
		return r;
	},
	
	getRules : function(wh)
	{
		var s = null;
		if(document.styleSheets && document.styleSheets.length)
		{
			var i, j, k, m, x, y, is = true;
			s = new Array();
			for(i=0; i < document.styleSheets.length; i++)
			{
				j = document.styleSheets.item(i);
				if(wh) is = (j.title || j.id) == wh;
				if(is)
				{
					if(j.cssRules) // mozilla
					{
						for(k=0; m = j.cssRules.item(k); k++)
						{
							if(m.styleSheet && m.styleSheet.cssRules.length) // imported sheets
								for(x=0; y = m.styleSheet.cssRules.item(x); x++) s.push([y.selectorText, y.style.cssText]);
							else s.push([m.selectorText, m.style.cssText])
						}
					}
					else if(j.rules) // explorer
					{
						if(j.imports && j.imports.length)
						{
							for(k=0; m = j.imports[k]; k++)
								for(x=0; y = m.rules[x]; x++)
									s.push([y.selectorText, y.style.cssText]);
						}
						for(k=0; m = j.rules[k]; k++)
								s.push([m.selectorText, m.style.cssText]);
					}
				}
				if(wh && is) break;
				else is = true;
			}
		}
		return s;
	},
	
	getStyle : function(obj,sty)
	{
		var sty2 = IEmarginFix.compactStyle(sty);
		var r = obj.style[sty2];
		if(r=='')
		{
			if(document.defaultView) r = document.defaultView.getComputedStyle(obj,'').getPropertyValue(sty);
			else r = obj.currentStyle[sty2];
		}
		if(!r) r = null;
		return r;
	},

	compactStyle : function(str)
	{
		var s = str.split('-');	var o = [s[0]];
		for(i=1;(j=s[i]);i++) { o[o.length] = j.charAt(0).toUpperCase(); o[o.length] = j.substring(1) };
		return o.join('');
	}
}

IEmarginFix.init();