They make up the cardiac pacemaker, that is, the natural pacemaker of the heart. In most humans, the concentration of pacemaker cells in the sinoatrial (SA) node is the natural pacemaker, and the resultant rhythm is a sinus rhythm. Sometimes an ectopic pacemaker sets the pace, if the SA node is damaged or if the electrical conduction system of the heart has problems.
Lobo is an extensible all-Java web browser and RIA platform. It supports HTML 4, Javascript (AJAX) and CSS 2 plus direct JavaFX and Java (Swing/AWT) rendering. Cobra is the web browser's renderer API; also a Javascript-aware HTML parser.
You may notice that in some of the screenshots above you can also enable and disable Java in your web browser. JavaScript is a scripting language that is normally used in web pages and runs on your computer when your browser displays a page.The ability to run JavaScript is built in to almost all web browsers. Java is a programming language that is far more capable than JavaScript.ou may notice that in some of the screenshots above you can also enable and disable Java in your web browser. JavaScript is a scripting language that is normally used in web pages and runs on your computer when your browser displays a page.