代码实现功能:
1.点击登录保存cookie
2.刷新或重新打开页面读出cookie
3.点击delete 删除当前username下的cookie
没有完成的问题:
大家看到在setCookie方法里能设置许多东西，如过期时间，作用域，保存路径等,但由于对这几个参数改如何设置不太清楚，比如作用域就是页面的根域名,路径该保存成什么格式的，如果有谁知道，请告诉我哈，谢谢了
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd"><html xmlns="http://www.w3.org/1999/xhtml"><head><meta http-equiv="Content-Type" content="text/html; charset=gb2312" /><title>无标题文档</title>
<script type="text/javascript">
function GetCookieVal(offset)//获得Cookie解码后的值
{
var endstr = document.cookie.indexOf (";", offset);if (endstr == -1)endstr = document.cookie.length;return unescape(document.cookie.substring(offset, endstr));
}function SetCookie(name, value)//设定Cookie值{var expdate = new Date();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;if(expires!=null) expdate.setTime(expdate.getTime() + ( expires * 1000 ));document.cookie = name + "=" + escape (value) +((expires == null) ? "" : ("; expires="+ expdate.toGMTString()))+((path == null) ? "" : ("; path=" + path)) +((domain == null) ? "" : ("; domain=" + domain))+((secure == true) ? "; secure" : "");}function DelCookie(name)//删除Cookie{var exp = new Date();exp.setTime (exp.getTime() - 1);var cval = GetCookie (name);document.cookie = name + "=" + cval + "; expires="+ exp.toGMTString();}function GetCookie(name)//获得Cookie的原始值{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 get$(obj){return document.getElementById(obj);}
</script></head><body onload="javascript:get$('username').value=GetCookie('Page')==null?'':GetCookie('Page');get$('password').value=GetCookie(GetCookie('Page'))==null?'':GetCookie(GetCookie('Page'));"><table width="580" border="0" align="center"> <tr> <td width="114"> </td> <td width="456"> </td> </tr> <tr> <td>用户名:</td> <td><input type="text" name="username" id="username"/></td> </tr> <tr> <td>密码</td> <td><input type="text" name="password" id="password" /></td> </tr> <tr> <td><input type="button" name="Submit" value="登陆" onclick="SetCookie('Page',get$('username').value);SetCookie(get$('username').value,get$('password').value);"/></td> <td><input type="button" value="delete" onclick="DelCookie(GetCookie('Page'));DelCookie('Page');get$('username').value='';get$('password').value='';"/></td> </tr></table></body></html>