实例84.检测用户登录信息.html

JSP网页中用到的JavaScript特效

<SCRIPT LANGUAGE="JavaScript">
<!--
var cookieDays = 20;                 
var exp = new Date();                
exp.setTime(exp.getTime() + (cookieDays*24*60*60*1000));  
function Who(info)                   
{
var VisitorName = GetCookie('VisitorName')  
if (VisitorName == null) {               
  VisitorName = prompt("what's your name?");  
  SetCookie ('VisitorName', VisitorName, exp); 
}
return VisitorName;                          
}

function When(info)                    
{
var rightNow = new Date()
var WWHTime = 0;
WWHTime = GetCookie('WWhenH')           
WWHTime = WWHTime * 1
var lastHereFormatting = new Date(WWHTime);
var intLastVisit = (lastHereFormatting.getYear() * 10000)+(lastHereFormatting.getMonth() * 100) + lastHereFormatting.getDate()   
var lastHereInDateFormat = "" + lastHereFormatting;
var dayOfWeek = lastHereInDateFormat.substring(0,3)         
var dateMonth = lastHereInDateFormat.substring(4,11)        
var timeOfDay = lastHereInDateFormat.substring(11,16)        
var year = lastHereInDateFormat.substring(23,25)            
var WWHText = dayOfWeek + ", " + dateMonth + " at " + timeOfDay  
SetCookie ("WWhenH", rightNow.getTime(), exp)           
return WWHText
}

function Count(info)                          
{
var WWHCount = GetCookie('WWHCount')          
if (WWHCount == null) {
  WWHCount = 0;
}
else{
  WWHCount++;
}
SetCookie ('WWHCount', WWHCount, exp);         
return WWHCount;
}


function getCookieVal (offset)                
{ 
var endstr = document.cookie.indexOf (";", offset);    
if (endstr == -1)    
  endstr = document.cookie.length;  
  return unescape(document.cookie.substring(offset, endstr));
}

function GetCookie (name)                     
{  
var arg = name + "="; 
var alen = arg.length;                          
var clen = document.cookie.length;            
var i = 0;  
while (i < clen) 
{                            
  var j = i + alen;          
  if (document.cookie.substring(i, j) == arg)      
    return getCookieVal (j);    
    i = document.cookie.indexOf(" ", i) + 1;    
  if (i == 0) break;   
  }  
  return null;
}

function SetCookie (name, value)     
{  
var argv = SetCookie.arguments;          
var argc = SetCookie.arguments.length;   
var expires = (argc > 2) ? argv[2] : null;  
var path = (argc > 3) ? argv[3] : null;  
var domain = (argc > 4) ? argv[4] : null;  
var secure = (argc > 5) ? argv[5] : false;  
document.cookie = name + "=" + escape (value) + ((expires == null) ? "" : ("; expires=" + expires.toGMTString())) + ((path == null) ? "" : ("; path=" + path)) + ((domain == null) ? "" : ("; domain=" + domain)) + ((secure == true) ? "; secure" : "");  
}

document.write("Hello " + Who() + ". <br>您已经登录本站" + Count() + " 次了.<br>上次登录是:" + When() +".");

// -->
</SCRIPT>