Um mehrere externe Stylesheets zu benutzen, bin man zuerst die verschiedenen CSS-Dateien im
-Bereich der Seite ein:<link rel="stylesheet" type="text/css" href="style/ff.css" title="small" /> <link rel="alternate stylesheet" type="text/css" href="style/big.css" title="big" />
Nun bindet man folgendes Javascript in die Seite ein.
function set_active_sheet(title) { var i, a, main; for(i=0; (a = document.getElementsByTagName("link")[i]); i++) { if(a.getAttribute("rel").indexOf("style") != -1 && a.getAttribute("title")) { a.disabled = true; if(a.getAttribute("title") == title) a.disabled = false; } } } function get_active_sheet() { var i, a; for(i=0; (a = document.getElementsByTagName("link")[i]); i++) { if(a.getAttribute("rel").indexOf("style") != -1 && a.getAttribute("title") && !a.disabled) return a.getAttribute("title"); } return null; } function get_preferred_sheet() { var i, a; for(i=0; (a = document.getElementsByTagName("link")[i]); i++) { if(a.getAttribute("rel").indexOf("style") != -1 && a.getAttribute("rel").indexOf("alt") == -1 && a.getAttribute("title") ) return a.getAttribute("title"); } return null; } function create_cookie(name,value,days) { if (days) { var date = new Date(); date.setTime(date.getTime()+(days*24*60*60*1000)); var expires = "; expires="+date.toGMTString(); } else expires = ""; document.cookie = name+"="+value+expires+"; path=/"; } function read_cookie(name) { var nameEQ = name + "="; var ca = document.cookie.split(';'); for(var i=0;i < ca.length;i++) { var c = ca[i]; while (c.charAt(0)==' ') c = c.substring(1,c.length); if (c.indexOf(nameEQ) == 0) return c.substring(nameEQ.length,c.length); } return null; } window.onload = function(e) { var cookie = read_cookie("style"); var title = cookie ? cookie : get_preferred_sheet(); set_active_sheet(title); } window.onunload = function(e) { var title = get_active_sheet(); create_cookie("style", title, 365); } var cookie = read_cookie("style"); var title = cookie ? cookie : get_preferred_sheet(); set_active_sheet(title);
Als nächstes muss man noch Links definieren, die den Swicht des Stylesheets auslösen:
Schriftgröße rauf Schriftgröße runter