/**

 * Check required support for TOC.

 */

function support() {

    if (document.getElementsByTagName && document.styleSheets) {

        tocSupported = true;

    }

}

/** Flag if dynamic TOC is supported */

var tocSupported = false;

support();

/** Current active TOC node. */

var currentHighlight = null;

/** Regexp for backslash, used to turn Windows pseudo-URLs to URLs. */

var slashRegExp = new RegExp("\\\\", "g");

function getBaseUrl() {

    var topLocation = window.top.location;

    var i = topLocation.pathname.indexOf(URL_BASE);

    if (i != -1) {

        return topLocation.protocol + "//"

             + topLocation.hostname + (topLocation.port == "" ? "" : ":" + topLocation.port)

             + topLocation.pathname.substring(0, i).replace(slashRegExp, "/");

    } else if (topLocation.pathname.substring(topLocation.pathname.length - 1) == "/") {

        return topLocation.protocol + "//"

             + topLocation.hostname + (topLocation.port == "" ? "" : ":" + topLocation.port)

             + topLocation.pathname;

    } else {    

        return undefined;

    }

}

/*

var isIE = (window.navigator.appVersion.indexOf("MSIE 6") !== -1);

*/

/**

 * Hightlight TOC node.

 *

 * @param node TOC node to highlight

 */

function highlightTocItem(node) {

    if (tocSupported) {

        // turn old off

/*

        if (isIE) {

        	var lis = node.ownerDocument.getElementsByTagName("*");

            for (var i = 0; i < lis.length; i++) {

                removeClass(lis.item(i), TOC_CLASS_ACTIVE);

            }

        } else {

*/

	        if (currentHighlight === null || !isClass(currentHighlight, TOC_CLASS_ACTIVE)) {

	            // turn all off

	            var lis = node.ownerDocument.getElementsByTagName(TOC_ELEMENT_ITEM);

	            for (var i = 0; i < lis.length; i++) {

	                removeClass(lis.item(i), TOC_CLASS_ACTIVE);

	            }

	        } else {

	            removeClass(currentHighlight, TOC_CLASS_ACTIVE);

	        }

/*

        }

*/

        // turn this on

        addClass(node.parentNode, TOC_CLASS_ACTIVE);

        currentHighlight = node.parentNode;

/*

        // IE6 addition, because it doesn't support > in CSS selectors

        if (isIE) {

      	    addClass(node, TOC_CLASS_ACTIVE);

      	}

*/

    }

}

/**

 * Toggle child node display.

 *

 * @param n Target node of the event.

 */

//moved to toc.js

/*

function toggle(n) {

    // toggle controller

    if (isClass(n, "toc-controller-open")) {

        n.firstChild.data = "+";

        switchClass(n, "toc-controller-closed", "toc-controller-open");

    } else {

        n.firstChild.data = "-";

        switchClass(n, "toc-controller-open", "toc-controller-closed");

    }

    // toggle content    

    i = getNextSiblingByTagName(n.parentNode.firstChild, "ul");

    if (i != null) {

        if (i.style.display == "none") {

            i.style.display = "block";

        } else {

            i.style.display = "none";

        }        

    }

}

*/

/* Move to common utils. */

/**

 * Get first child element by element name.

 *

 * @param node parent element

 * @param name element name of the desired child elements

 * @return DOM Element, null if none found

 * @type Object

 */

function getFirstChildElementByTagName(node, name) {

    var tag = undefined;

    if (name !== undefined) {

        tag = name.toLowerCase();

    }

    for (var n = node.firstChild; n != null; n = n.nextSibling) {

        if (n.nodeType == 1 && (name === undefined || n.nodeName.toLowerCase() == tag)) {

          return n;

        }

    }

    return null;

}

/**

 * Get first element by class name.

 *

 * @param node DOM node whose descendants select

 * @param cls class name

 * @param elem element name (optional)

 * @return DOM Element, null if none found

 * @type Object

 */

function getFirstElementByClassName(node, cls, elem) {

      if (elem === undefined) {

          elem = "*";

      }

      for (var el = document.getElementsByTagName(elem), i = 0; i < el.length; i++) {

            if (isClass(el[i], cls)) {

                return el[i];

        }

      }

      return null;

}