document.write("<font color='white'><a href='javascript:doZoom(1)' target='_self' class='chl'>放大</a> | <a href='javascript:doZoom(0)' target='_self' class='chl'>还原</a> | <a href='javascript:doZoom(-1)' target='_self' class='chl'>缩小</a> | ");
document.write("<a href='javascript:void(0)' onClick='window.print();return false' class='chl'>打印</a> | <a href='javascript:void(0)' onClick='top.close();return false' class='chl'>关闭</a> &nbsp;</font>");