javascripot div登陆提示框(页面层不可用)

 

< html >
< head >
< meta http - equiv = " Content-Type "  content = " text/html; charset=gb2312 "   />
< title > greencss.com </ title >
< script type = " text/javascript " >
function sAlert(str,stitle){
var msgw,msgh,bordercolor;
msgw = 300 ; // 提示窗口的宽度
msgh = 100 ; // 提示窗口的高度
titleheight = 25   // 提示窗口标题高度
bordercolor = " #336699 " ; // 提示窗口的边框颜色
titlecolor = " #99CCFF " ; // 提示窗口的标题颜色

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=2,opacity=25,finishOpacity=75 " ;
bgObj.style.opacity = " 0.6 " ;
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;" onclick="">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;

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
}
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 = " <a href=http://www.myziy.com><img border=0 src= " + str + " ></img></a> " ; // 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(button); // 在提示框div中添加按钮对象button
}

</ script >
</ head >

< body >
< p onclick = " sAlert('logo.png','登录'); " > 登陆 </ p >
</ body >
</ html >