function ts(a){if(window.document){fs=window.document.getElementById("article").style.fontSize;if(!fs){ns=a?"13":"11"}else{ns=fs.substring(0,fs.indexOf("px"));ns=a?(ns*1)+1:(ns*1)-1;if(ns>16){ns=16}if(ns<9){ns=9}}window.document.getElementById("article").style.fontSize=ns+"px"}}