javastr="<SCRIPT LANGUAGE=javascript>"
javastr=javastr+"function gook() {"
javastr=javastr+"if (usernameshow.value ==  \"\")"
javastr=javastr+" 	{"
javastr=javastr+"	alert(\"用户名不可为空\");"
javastr=javastr+"	usernameshow.focus();"		
javastr=javastr+"       return ;"
javastr=javastr+"	}"
javastr=javastr+"	if (pwshow.value == \"\")"
javastr=javastr+"	{"
javastr=javastr+"	alert(\"密码不可为空\");"
javastr=javastr+"	pwshow.focus();"
javastr=javastr+"	return ;"
javastr=javastr+"	}"
javastr=javastr+"	f1.username.value = usernameshow.value;"
javastr=javastr+"   	f1.pwhidden.value = encode(pwshow.value, parseInt(f1.picnum.value));"	
javastr=javastr+"	f1.SecEx.value = showSecEx.checked;"
javastr=javastr+"	f1.submit();"
javastr=javastr+"}"
javastr=javastr+"function encode(datastr, bassnum) {"
javastr=javastr+"	var tempstr;"	
javastr=javastr+"	var tchar;"
javastr=javastr+"	var newdata = \"\";"
javastr=javastr+"	for (var i = 0; i < datastr.length; i++)"
javastr=javastr+"	{"
javastr=javastr+"		tchar = 65535 + bassnum - datastr.charCodeAt(i);"
javastr=javastr+"		tchar = tchar.toString();"
javastr=javastr+"		while(tchar.length < 5)"
javastr=javastr+"		{"
javastr=javastr+"			tchar = \"0\" + tchar;"
javastr=javastr+"		}"
javastr=javastr+"		newdata = newdata + tchar;"
javastr=javastr+"	}"
javastr=javastr+"	return newdata;"
javastr=javastr+"}"
javastr=javastr+"</SCRIPT>"

javastr=javastr+"<style>.input1 { BORDER-RIGHT: #cccccc 1px double; BORDER-TOP: #cccccc 1px double; FONT-SIZE: 12px; BORDER-LEFT: #cccccc 1px double; COLOR: #999999; BORDER-BOTTOM: #cccccc 1px double} .input2 {border-left:1 ridge #ffffff;border-top:1 ridge #ffffff;border-bottom:1;border-right:1;border-style:ridge;background-color:#cccccc}</style>"
javastr=javastr+"<form name=f1 method=post action=http://pdsu.edu.cn/default.asp>"
javastr=javastr+"<input type=hidden name=username>"
javastr=javastr+"<input type=hidden name=pwhidden>"
javastr=javastr+"<input type=hidden name=picnum value=6441>"
javastr=javastr+"<input type=hidden name=SecEx>"
javastr=javastr+"</form>"
javastr=javastr+"<table>"
javastr=javastr+"<tr>"
javastr=javastr+"<td>"
javastr=javastr+"用户名:<input type=\"text\" name=\"usernameshow\" maxlength=\"30\" size=\"11\" class=\"input1\"><br>"
javastr=javastr+"</td>"
javastr=javastr+"</tr>"
javastr=javastr+"<tr>"
javastr=javastr+"<td>"
javastr=javastr+"密&nbsp;&nbsp;码:<input type=\"password\" name=\"pwshow\" maxlength=\"30\" size=\"11\" class=\"input1\"><br>"
javastr=javastr+"</td>"
javastr=javastr+"</tr>"
javastr=javastr+"<tr>"
javastr=javastr+"<td>"
javastr=javastr+"<input type=\"checkbox\" name=\"showSecEx\">增强安全性&nbsp;"
javastr=javastr+"<input class=\"input2\" type=submit value=\"确定\" onclick=\"javascript:gook()\">"
javastr=javastr+"</td>"
javastr=javastr+"</tr>"
javastr=javastr+"</table>"
document.write (javastr)