document.writeln("<a href=/myxin/slhgs/ target=_blank title=数理化公式查询>数理化公式</a> <a href=/flash/ target=_blank>图片导航</a> <a href=/myxin/chip/ target=_blank>三极管查询</a><br><a href=/Soft/mcu/42.html>单片机宝典</a> ")
document.writeln("<a href=/photo/ target=_blank>电路原理图</a><br><A href=/Soft/simulate/55.html>电路公式查询计算手册</A> <a href=http://zh61.com.cn target=_blank>中华儿童网</a>")