Remember and display a person's name - JavaScript Made Easy: Free JavaScripts Tutorials Example Code

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Inserting Javascript

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Remember and display a person's name

This one asks a user to enter his/her name, and displays it whenever he/she should arrive.


Insert into <HEAD>


Insert into <BODY>
<script> <!-- // Copyright (c) 1996-1997 Tomer Shiran. All rights reserved. // Permission given to use the script provided that this notice remains as is. // Additional scripts can be found at http://www.geocities.com/~yehuda/ // Boolean variable specified if alert should be displayed if cookie exceeds 4KB var caution = false // name - name of the cookie // value - value of the cookie // [expires] - expiration date of the cookie (defaults to end of current session) // [path] - path for which the cookie is valid (defaults to path of calling document) // [domain] - domain for which the cookie is valid (defaults to domain of calling document) // [secure] - Boolean value indicating if the cookie transmission requires a secure transmission // * an argument defaults when it is assigned null as a placeholder // * a null placeholder is not required for trailing omitted arguments function setCookie(name, value, expires, path, domain, secure) { var curCookie = name + "=" + escape(value) + ((expires) ? "; expires=" + expires.toGMTString() : "") + ((path) ? "; path=" + path : "") + ((domain) ? "; domain=" + domain : "") + ((secure) ? "; secure" : "") if (!caution \|\| (name + "=" + escape(value)).length <= 4000) document.cookie = curCookie else if (confirm("Cookie exceeds 4KB and will be cut!")) document.cookie = curCookie } // name - name of the desired cookie // * return string containing value of specified cookie or null if cookie does not exist function getCookie(name) { var prefix = name + "=" var cookieStartIndex = document.cookie.indexOf(prefix) if (cookieStartIndex == -1) return null var cookieEndIndex = document.cookie.indexOf(";", cookieStartIndex + prefix.length) if (cookieEndIndex == -1) cookieEndIndex = document.cookie.length return unescape(document.cookie.substring(cookieStartIndex + prefix.length, cookieEndIndex)) } // name - name of the cookie // [path] - path of the cookie (must be same as path used to create cookie) // [domain] - domain of the cookie (must be same as domain used to create cookie) // * path and domain default if assigned null or omitted if no explicit argument proceeds function deleteCookie(name, path, domain) { if (getCookie(name)) { document.cookie = name + "=" + ((path) ? "; path=" + path : "") + ((domain) ? "; domain=" + domain : "") + "; expires=Thu, 01-Jan-70 00:00:01 GMT" } } // date - any instance of the Date object // * you should hand all instances of the Date object to this function for "repairs" // * this function is taken from Chapter 14, "Time and Date in JavaScript", in "Learn Advanced JavaScript Programming" function fixDate(date) { var base = new Date(0) var skew = base.getTime() if (skew > 0) date.setTime(date.getTime() - skew) } var now = new Date() fixDate(now) now.setTime(now.getTime() + 31 * 24 * 60 * 60 * 1000) var name = getCookie("name") if (!name) name = prompt("Please enter your name:", "John Doe") setCookie("name", name, now) document.write("Hello " + name + "!") //--> </script>

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