JS根据屏幕分辨率自动调整字体大小

window.οnlοad=font;
function font(){
if (screen.width <1024)
document.styleSheets[0].addRule("body","font-size:12px;");
else if (screen.width ==1024)
document.styleSheets[0].addRule("body","font-size:14px;");
else if (screen.width >1024)
document.styleSheets[0].addRule("body","font-size:16px;");
else
document.styleSheets[0].addRule("body","font-size:16px;");
}