天极网软件频道的用JS实现的图片切换特效

<html> <head> <title>网页教学网特效代码->>真正的万年历</title> <meta http-equiv="Content-Type" content="text/html; charset=gb2312"> </head> <body bgcolor="#000000" text="#999999" link="#33FF33" vlink="#33FF33" alink="#33FF33" onLoad="setToday()"> <SCRIPT LANGUAGE="JavaScript">  </SCRIPT> <CENTER> <H2>万年历</H2> <FORM NAME="calControl" onSubmit="return false;"> <TABLE CELLPADDING=0 CELLSPACING=0 BORDER=0> <TR><TD COLSPAN=7> <CENTER> <SELECT NAME="month" onChange="selectDate()"> <OPTION>一月 <OPTION>二月 <OPTION>三月 <OPTION>四月 <OPTION>五月 <OPTION>六月 <OPTION>七月 <OPTION>八月 <OPTION>九月 <OPTION>十月 <OPTION>十一月 <OPTION>十二月 </SELECT> <INPUT NAME="year" TYPE=TEXT SIZE=4 MAXLENGTH=4> <INPUT TYPE="button" NAME="Go" value="创建" onClick="selectDate()"> </CENTER> </TD> </TR> </FORM> <FORM NAME="calButtons"> <TR><TD align="center"><textarea FONT="Courier" NAME="calPage" WRAP=no ROWS=8 COLS=24></textarea></TD><TR><TD><CENTER> <INPUT TYPE=BUTTON NAME="previousYear" VALUE="<<" onClick="setPreviousYear()"> <INPUT TYPE=BUTTON NAME="previousYear" VALUE="< " onClick="setPreviousMonth()"> <INPUT TYPE=BUTTON NAME="previousYear" VALUE="Today" onClick="setToday()"> <INPUT TYPE=BUTTON NAME="previousYear" VALUE="> " onClick="setNextMonth()"> <INPUT TYPE=BUTTON NAME="previousYear" VALUE=">>" onClick="setNextYear()"> </CENTER></TD></TR> </form></TABLE></FORM> </center></body> </html>