用javascript实现记录来宾姓名的代码

答案：
<script language="JavaScript"> 
<!-- Begin 
var expDays = 30; 
var exp = new Date();  
exp.setTime(exp.getTime() + (expDays*24*60*60*1000)); 
function Who(info){ 
var VisitorName = GetCookie('VisitorName') 
if (VisitorName == null) { 
VisitorName = prompt("ÄúµÄ×ðÐÕ´óÃû£º"); 
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 set(){ 
VisitorName = prompt("Who are you?"); 
SetCookie ('VisitorName', VisitorName, exp); 
SetCookie ('WWHCount', 0, exp); 
SetCookie ('WWhenH', 0, exp); 
} 
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" : ""); 
} 
function DeleteCookie (name) {  
var exp = new Date();  
exp.setTime (exp.getTime() - 1);  
var cval = GetCookie (name);  
document.cookie = name + "=" + cval + "; expires=" + exp.toGMTString(); 
} 
// End --> 
</script> 


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