if (typeof PWCC == "undefined" || !PWCC) {
	//create PWCC namespace if it hasn't been done already
	PWCC = new Object();
}


/* credit due
	dynamicCSS.js v1.0 <http://www.bobbyvandersluis.com/articles/dynamicCSS.php>
	Copyright 2005 Bobby van der Sluis
	This software is licensed under the CC-GNU LGPL <http://creativecommons.org/licenses/LGPL/2.1/>

	
	changes
	- moved to pwcc namespace
	- added media to passed variables

*/
PWCC.createStyleRule = function (selector, declaration, media) {
	if (media == null) {
		media = 'screen';
	}
    if (!document.getElementsByTagName ||
      !(document.createElement || document.createElementNS)) return;
    var agt = navigator.userAgent.toLowerCase();
    var is_ie = ((agt.indexOf("msie") != -1) &&  (agt.indexOf("opera") == -1));
    var is_iewin = (is_ie &&  (agt.indexOf("win") != -1));
    var is_iemac = (is_ie &&  (agt.indexOf("mac") != -1));
    if (is_iemac) return; // script doesn't work properly in IE/Mac
    var head = document.getElementsByTagName("head")[0]; 
    var style = (typeof document.createElementNS != "undefined") ?
      document.createElementNS("http://www.w3.org/1999/xhtml", "style") :
      document.createElement("style");
    if (!is_iewin) {
        var styleRule = document.createTextNode(selector + " {" + declaration + "}");
            style.appendChild(styleRule); // bugs in IE/Win
    }
        style.setAttribute("type", "text/css");
    style.setAttribute("media", media); 
    head.appendChild(style);
    if (is_iewin &&  document.styleSheets &&  document.styleSheets.length > 0) {
        var lastStyle = document.styleSheets[document.styleSheets.length - 1];
        if (typeof lastStyle.addRule == "object") {
            lastStyle.addRule(selector, declaration);
        }
    }
}
PWCC.equalHeight = function (expr, className, media) {
	if (className == null) {
		className = 'equalHeight';
	}
	if (media == null) {
		media = 'screen'; //default
	}

	//split expr at = signs
	var sections = expr.split("=");

	//generate class name
	var classRandom = Math.floor(Math.random()*999999);
	className = className + '-' + classRandom;

	
	//get column heights, add class name to html elemenets
	var objects = new Array();
	var maxHeight = 0;
	for(var i=0; i < sections.length; i++) {
		objects[i] = document.getElementById(sections[i]);
		PWCC.addClass(objects[i], className);
		//addClass is in base.js - it adds a class to an element.
		
		if (objects[i].offsetHeight > maxHeight) {
			maxHeight = objects[i].offsetHeight;
		}
	}	
	
	//create css declaration
	var classDeclaration = 'min-height: ' + maxHeight + 'px;'
	var ie6Declaration = 'height: ' + maxHeight + 'px;'
	PWCC.createStyleRule('.' + className, classDeclaration, media);
	PWCC.createStyleRule('* html .' + className, ie6Declaration, media);
}

PWCC.addLoadEvent(function() {
	//addLoadEvent is in base.js - adds code to window.onload
	PWCC.equalHeight('content=sidebar');
});