网页特效_密码类_输入密码后才能进入页面

脚本说明:
第一步:把如下代码加入<head>区域中
<SCRIPT LANGUAGE="JavaScript">
<!-- Hide
al="`1234567890-=~!@#$%^&*()_+qwer"
+"tyuiop[]QWERTYUIOP{}|asdfghjkl;A"
+"SDFGHJKL:zxcvbnm,./ZXCVBNM<>?";
ab1="";
bctr=0;
function ckPwd(){
tst=document.isn.username.value
+"*"+document.isn.passwrd.value+"*";
ls=document.pd.pe.value;
a=eval(ls.substring(0,2))-91;
ls=ls.substring(2,ls.length);
nls="";
flg=0;
while (ls.length>12){
ab=eval(ls.substring(0,2))-89;
ab1=(ab1==""?""+ab:ab1);
oab1=ab1;
ls=ls.substring(2,ls.length);
for (var i=0;i<ab;i++){
nr=eval(ls.substring(0,2))-a;
ls=ls.substring(2,ls.length);
nls+=al.charAt(nr);
}
nls+="*";
if (nls.indexOf(tst)>-1){
ls="";
flg=1;
}
}
if (flg==1){
tstOk();
}
else{
bctr++;
if (bctr>3){
location.href="nopass.htm";
}
else{
alert("对不起,用户名/密码错误."
+" 你已试登录"+bctr+"次.");
}
}
}

function tstOk(){
ab1=ab1+""+a;
alert("正确，开始登录!");
location.href="pwds.htm?"+ab1;
}

// End Hiding -->
</SCRIPT>

第二步:把如下代码加入<body>区域中
<FORM NAME="pd">


<INPUT TYPE='hidden' NAME='pe' VALUE='93936936587896061905577720539389533133955868586858
68976834793758313033975834793758313033 '>
</FORM>

<FORM NAME="isn">
<TABLE BORDER=2 CELLPADDING=5 CELLSPACING=0 BGCOLOR=BLUE>
<TR><TD COLSPAN=2 ALIGN=CENTER><FONT SIZE=4 COLOR=WHITE FACE="楷体_GB2312"><B>请您输入</B></FONT></TD></TR>
<TR><TD><FONT SIZE=3 COLOR=WHITE><B>UserName:</B></FONT></TD>
<TD><INPUT TYPE="text" NAME="username" VALUE="" SIZE=10></TD></TR>
<TR><TD><FONT SIZE=3 COLOR=WHITE><B>Password:</B></FONT></TD>
<TD><INPUT TYPE="password" NAME="passwrd" VALUE="" SIZE=10></TD></TR>
<TR><TD COLSPAN=2 ALIGN=CENTER><INPUT TYPE="button"
NAME="btn" VALUE=" 登录 " onClick="ckPwd();return false;"></TD></TR>
</TABLE></FORM>
<TABLE BORDER=1 WIDTH=486>
<TR><TD COLSPAN=3 ALIGN=CENTER><FONT FACE="楷体_GB2312">
<B>你可以使用如下号码:</B></FONT></TD</TR>