在一个网页中，有三个按钮是小，中，大，使用Javascr ipt编写程序实现当点击一个按钮时，网页就按照相应的字体大小显示网页的文字。个人写的比较简单。-In a web page, there are three buttons are small, medium, large, using the Javascr ipt programming when the click of a button, the page is displayed in accordance with the appropriate font size of the text of the page. Personal written in relatively simple.