div隐藏层登录框及使用ajax写入cookies心得

最近刚做了一个时下比较流行的隐藏层录页面，登录过程使用了ajax，但是奇怪的是，程序运行到添加cookies时就无端终止了，郁闷..跟踪无果，网上查询亦无果，无奈下只有借用javascript的cookies，用户登录过程是ajax验证完成后，返回正确标记同时返回登录的用户名ID，这样就可以在javascript中实现这样的效果。这个登录框完全效仿baidu知道的登录模式，唯一的不同点是百度知道的登录框调用了一个页面，其实就是使用一个iframe框架而已，基本类似。这里将整个登录过程代码贴出：前台页面：

< p onClick ="sAlert('login','登录');" >

< asp:Literal ID ="litStatus" Text ="登录" runat ="server" ></ asp:Literal ></ p >

< p onClick ="logout();" >

< asp:Literal ID ="litLoginout" Visible =false Text ="退出" runat ="server" ></ asp:Literal ></ p >

javascript相关程序：

function sAlert(str,stitle){

var msgw,msgh,bordercolor;

msgw=300;//提示窗口的宽度

msgh=200;//提示窗口的高度

titleheight=25 //提示窗口标题高度

bordercolor="#78B664";//提示窗口的边框颜色

var sWidth,sHeight;

sWidth=document.body.offsetWidth;//浏览器工作区域内页面宽度

sHeight=screen.height;//屏幕高度（垂直分辨率）

//背景层（大小与窗口有效区域相同，即当弹出对话框时，背景显示为放射状透明灰色）

var bgObj=document.createElement("div");//创建一个div对象（背景层）

//定义div属性，即相当于

//<div id="bgDiv" style="position:absolute; top:0; background-color:#777; filter:progid:DXImagesTransform.Microsoft.Alpha(style=3,opacity=25,finishOpacity=75); opacity:0.6; left:0; width:918px; height:768px; z-index:10000;"></div>

bgObj.setAttribute('id','bgDiv');

bgObj.style.position="absolute";

bgObj.style.top="0";

bgObj.style.background="#777";

bgObj.style.filter="progid:DXImageTransform.Microsoft.Alpha(style=0,opacity=10,finishOpacity=75";

bgObj.style.opacity="1";

bgObj.style.left="0";

bgObj.style.width=sWidth + "px";

bgObj.style.height=sHeight*2 + "px";

bgObj.style.zIndex = "10000";

document.body.appendChild(bgObj);//在body内添加该div对象

var msgObj=document.createElement("div")//创建一个div对象（提示框层）

//定义div属性，即相当于

//<div id="msgDiv" align="center" style="background-color:white; border:1px solid #336699; position:absolute; left:50%; top:50%; font:12px/1.6em Verdana,Geneva,Arial,Helvetica,sans-serif; margin-left:-225px; margin-top:npx; width:400px; height:100px; text-align:center; line-height:25px; z-index:100001;"></div>

msgObj.setAttribute("id","msgDiv");

msgObj.setAttribute("align","center");

msgObj.style.background="white";

msgObj.style.border="1px solid " + bordercolor;

msgObj.style.position = "absolute";

msgObj.style.left = "50%";

msgObj.style.top = "20%";

msgObj.style.font="12px/1.6em Verdana, Geneva, Arial, Helvetica, sans-serif";

msgObj.style.marginLeft = "-225px" ;

msgObj.style.marginTop = -75+document.documentElement.scrollTop+"px";

msgObj.style.width = msgw + "px";

msgObj.style.height =msgh + "px";

msgObj.style.textAlign = "center";

msgObj.style.lineHeight ="25px";

msgObj.style.zIndex = "10001";

var title=document.createElement("h4");//创建一个h4对象（提示框标题栏）

//定义h4的属性，即相当于

//< h4 id="msgTitle" align="right" style="margin:0; padding:3px; background-color: #336699; filter:progid:DXImageTransform.Microsoft.Alpha(startX=20, startY =20, finishX=100, finishY=100,style=1,opacity=75,finishOpacity=100); opacity: 0.75; border:1px solid #336699; height:18px; font:12px Verdana,Geneva,Arial, Helvetica,sans-serif; color:white; cursor:pointer;" οnclick="">关闭< /h4>

title.setAttribute("id","msgTitle");

title.setAttribute("align","right");

title.style.margin="0";

title.style.padding="3px";

title.style.background=bordercolor;

title.style.filter="progid:DXImageTransform.Microsoft.Alpha(startX=20, startY=20, finishX=100, finishY=100,style=1,opacity=75,finishOpacity=100);";

title.style.opacity="0.75";

title.style.border="1px solid " + bordercolor;

title.style.height="18px";

title.style.font="12px Verdana, Geneva, Arial, Helvetica, sans-serif";

title.style.color="white";

title.style.cursor="pointer";

title.innerHTML="关闭";

title.onclick=removeObj;

var button=document.createElement("input");//创建一个input对象（提示框按钮）

//定义input的属性，即相当于

//<input type="button" align="center" style="width:100px; align:center; margin-left:250px; margin-bottom:10px;" value="关闭">

button.setAttribute("type","button");

button.setAttribute("value","关闭");

button.style.width="60px";

button.style.align="center";

button.style.marginLeft="250px";

button.style.marginBottom="10px";

button.style.background=bordercolor;

button.style.border="1px solid "+ bordercolor;

button.style.color="white";

button.onclick=removeObj;

var button1=document.createElement("input");//创建一个input对象（提示框按钮）

//定义input的属性，即相当于

button1.setAttribute("type","button");

button1.setAttribute("value","登录");

button1.style.width="60px";

button1.style.align="center";

button1.style.marginLeft="250px";

button1.style.marginBottom="10px";

button1.style.background=bordercolor;

button1.style.border="1px solid "+ bordercolor;

button1.style.color="white";

button1.onclick=login;

function removeObj(){ //点击标题栏触发的事件

document.body.removeChild(bgObj);//删除背景层Div

document.getElementById("msgDiv").removeChild(title);//删除提示框的标题栏

document.body.removeChild(msgObj);//删除提示框层

}

function login()

{

var strUserName=document.getElementById("username").value;

var strPass=document.getElementById("pass").value;

test.UserLogin(strUserName,strPass,loginUser_callback);

}

function loginUser_callback(response)

{

if(response.value=="0")

{

alert("登录成功！");

removeObj();

SetCookie ("userID", "3")

window.location.reload();

}

else

{

alert("登录失败！");

}

document.body.appendChild(msgObj);//在body内添加提示框div对象msgObj

document.getElementById("msgDiv").appendChild(title);//在提示框div中添加标题栏对象title

var txt=document.createElement("p");//创建一个p对象（提示框提示信息）

//定义p的属性，即相当于

//<p style="margin:1em 0;" id="msgTxt">测试效果</p>

txt.style.margin="1em 0"

txt.setAttribute("id","msgTxt");

txt.innerHTML="<strong>国际糖尿病注册用户请直接登录</strong></br></br>用户名:<input id='username' width='170' name='username' /><br></br>密   码:<input id='pass' type='PassWord' width='170' name='pass' /></br></br>";//来源于函数调用时的参数值

document.getElementById("msgDiv").appendChild(txt);//在提示框div中添加提示信息对象txt

document.getElementById("msgDiv").appendChild(button1);

}

function SetCookie(name,value)//两个参数，一个是cookie的名子，一个是值

{

var Days = 30; //此 cookie 将被保存 30 天

var exp = new Date(); //new Date("December 31, 9998");

exp.setTime(exp.getTime() + Days*24*60*60*1000);

document.cookie = name + "="+ escape (value) + ";expires=" + exp.toGMTString();

}

function getCookie(name)//取cookies函数

{

var arr = document.cookie.match(new RegExp("(^| )"+name+"=([^;]*)(;|$)"));

if(arr != null) return unescape(arr[2]); return null;

}

function delCookie(name)//删除cookie

{

var exp = new Date();

exp.setTime(exp.getTime() - 1);

var cval=getCookie(name);

if(cval!=null) document.cookie= name + "="+cval+";expires="+exp.toGMTString();

}

function logout()

{

delCookie("userID");

window.location.reload();

}

CS层，ajax执行方法：

[Ajax.AjaxMethod]

public string UserLogin( string userName, string passWord)

{

TNB.DAL.CommonDAL dal = new TNB.DAL.CommonDAL();

TNB.Model.CommonModel model = new TNB.Model.CommonModel();

model.Fields = "*";

model.Where = "UserName='" + userName + "' and UserPass='" + System.Web.Security.FormsAuthentication.HashPasswordForStoringInConfigFile(passWord, "MD5") + "'";

model.Tables = "Users";

DataSet ds = dal.GetList(model);

if (ds.Tables[0].Rows.Count > 0)

{

return "0";

}

else

{

return "1";

}

div隐藏层登录框及使用ajax写入cookies心得

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