document.write('<DIV align=center style=width:0px;LEFT:250px;TOP:0px;POSITION:absolute>')
document.write('<input type="button" name=show value="留言" style="width:35px;height:18;background-image:url(http://www.news.mongol-ger.com/it/4268/qan32.gif);border:1px" onclick=window.open("http://www.fjzyzxpy.com/liuyan/")>');
document.write('</div>')
这是加按纽的代码，调坐标要自己调