menu

// These are the parameters to define the appearance of the menu. var showNumbers = false; // display the ordering strings: yes=true | no=false var tocBehaviour = new Array(1,0); // Indicates how the menu shall change when clicking in the heading symbol (1st arg.) resp. in the heading text (2nd arg). Arg's meaning: 0 = No change, 1 = menu changes with automatic collapsing, 2 = menu changes with no automatic collapsing. var tocLinks = new Array(1,0); // Indicates wether the content's location shall be changed when clicking in the heading symbol (1st arg.) resp. in the heading text (2nd arg). Arg's meaning: 1 = No, 0 = Yes. // Checking the client's browser var isIE = navigator.appName.toLowerCase().indexOf("explorer") > -1; // Other global variables: // oldCurrentNumber is required to keep a hedings ordering string (or number) in case the menu should change (tocChange > 0) // but the content's location should remain unchanged (i.e. noLink == 1). In those cases the heading preceeded by oldCurrentNumber // has to remain hilited (otherwise the heading preceeded by currentNumber has to be hilited). var oldCurrentNumber = ""; var oldLastVisitNumber = ""; // toDisplay: Array to keep the display status for each heading. It is initialised so only the top level headings are displayed // (headings preceeded by a single string without a dot): var toDisplay = new Array(); for (ir=0; ir\n\n"); toc.document.write("\n"); toc.document.write("menu\n\n"); toc.document.write("\n"); toc.document.write("\n"); toc.document.write("
\n"); // currentLevel = the level of the current heading: var currentNumArray = currentNumber.split("."); var currentLevel = currentNumArray.length-1; // currentIndex = Current heading's index in the tocTab array: var currentIndex = null; for (i=0; i currentLevel && toDisplay[currentIndex+1]; } else currentIsExpanded = false; // Determining the new URL and target (if given) of the current heading theHref = (noLink) ? "" : tocTab[currentIndex][2]; theTarget = tocTab[currentIndex][3]; // *********************************************************************** // 1st loop over the tocTab entries: Determining which heading to display: // *********************************************************************** for (i=1; i 0) { for (j=0; jcurrentLevel) ? false : isOnPath && (thisNumArray[j] == currentNumArray[j]); } } // By the following, the headings on the path to the current heading and the siblings of such headings (isOnPath==true, see above) will be displayed anyway. If the tocChange parameter is set to 1 no other heading will be displayed. If it is set to a number greater than 1 the headings that have been displayed before will additionally be displayed again. toDisplay[i] = (tocChange == 1) ? isOnPath : (isOnPath || toDisplay[i]); // Now let's perform the expand/collaps mechanism: If the heading is a descendant of the current heading it's next display depends on wether the current heading was expanded or collapsed. If it was expanded the descendants have not to be displayed this time, otherwise only the childs has to be displayed but not the grandchildren, great-grandchildren etc.. Remember that currentIsExpanded says wether the current heading was expanded or not. The if-clause is a criteria for being a descendant of the current heading. If it's a descendant and thisLevel == currentLevel+1 it's a child. if (thisNumber.indexOf(currentNumber+".") == 0 && thisLevel > currentLevel) { if (currentIsExpanded) toDisplay[i] = false; else toDisplay[i] = (thisLevel == currentLevel+1); } } } // End of loop over the tocTab // ********************************************************** // 2nd loop over the tocTab entries: Displaying the headings: // ********************************************************** for (i=0; i= nextLevel) ? "icon_dot_off" : ((toDisplay[i+1]) ? "icon_arrowdown_off" : "icon_arrowright_off"); } else img = "icon_dot_off"; // The last heading is always a leaf. // Now writing this menu line, i.e. a table row...: toc.document.writeln(""); // ...first some empty cells for the line indent depending on the level of this heading...: for (k=1; k<=thisLevel; k++) { toc.document.writeln(" "); } // ...then the hading symbol and the heading text each with a javaScript link caling just this function reDisplay again: // *** Luring's Index hack... *** var indexHack = (thisNumber == "index_key") ? "CLASS=\"IndexKey\" " : ""; // Create a unique id for each image // Note: For some strange reason, this won't work if you leave out the +"a" thing at the end. // Don't ask me why - It's just one of those wierd things... var imgName = new String(thisNumber.replace(/\./g, "dot") +"a"); // Change tocBehaviour[0] to [1] if you want it to be a link instead of expanding/collapsing the menu item... toc.document.writeln(" "); toc.document.writeln(" "); toc.document.writeln(""); } } // End of loop over the tocTab // ********************************************************************************************************* // Closing the menu document and displaying new content in the content frame or in the top window if required // ********************************************************************************************************* // Updating the global variables oldCurrentNumber and oldLastVisitNumber. See above for its definition if (!noLink) { oldLastVisitNumber = oldCurrentNumber; oldCurrentNumber = currentNumber; } // Closing the menu table and the document toc.document.writeln("

" + ((showNumbers)?(thisNumber+" "):" ") + tocTab[i][1] + "

\n"); toc.document.close(); // Setting the top or content window's location if required if (theHref) if (theTarget=="top") top.location.href = theHref; else if (theTarget=="parent") parent.location.href = theHref; else if (theTarget=="blank") open(theHref,""); else main.location.href = theHref; }