全屏友情提示

css代码：

*{...}{ 
    padding:0; 
    margin:0; 
    font-size:12px;
}

#bg{...}{
    background:#000000;
    opacity: 0.5;
    -moz-opacity:0.5; 
    filter:alpha(opacity=50); 
    width:100%; 
    height:100%;
    position:absolute; 
    top:0; 
    left:0
}

#info{...}{
    height:0px; 
    width:0px;
    top:50%; 
    left:50%;
    position:absolute;  
    line-height:1.7
}

#center{...}{
    background:#fff;
    border:1px solid #217AC1;
    width:300px; 
    height:100px; 
    position:absolute; 
    margin:-50px -150px;
}

#center strong{...}{ 
    display:block; 
    padding:2px 5px; 
    background:#EBF4FC; 
    color:#519FEE;
}

#center p{...}{
    padding:10px; 
    text-align:center; 
    color:#1C6FB8;
}

 

javascript代码：

function boxs(v)...{
 window.scrollTo(0,0);
 var bo = document.getElementsByTagName('body')[0];
 var ht = document.getElementsByTagName('html')[0];
 var boht = document.getElementById('boxs');    
 boht.innerHTML = '';
 bo.style.height='auto';
 bo.style.overflow='auto';
 ht.style.height='auto'; 
 if(v == 1)...{   
  bo.style.height='100%';
  bo.style.overflow='hidden';
  ht.style.height='100%';  
  boht.innerHTML = '<div id="bg"></div><div id="info"><div id="center"><strong>友情提醒：</strong><p><a href="javascript:boxs(0);">关了我吧！</a></p></div></div>';   
 }
} 

 

html代码：

<span id="boxs"></span>
<a href="javascript:boxs(1);">点这里测试一下</a>

 

效果：

*{ padding:0; margin:0; font-size:12px;}#bg{background:#000000;opacity: 0.5;-moz-opacity:0.5; filter:alpha(opacity=50); width:100%; height:100%;position:absolute; top:0; left:0}#info{height:0px; width:0px;top:50%; left:50%;position:absolute; line-height:1.7}#center{background:#fff;border:1px solid #217AC1;width:300px; height:100px; position:absolute; margin:-50px -150px;}#center strong{ display:block; padding:2px 5px; background:#EBF4FC; color:#519FEE;}#center p{padding:10px; text-align:center; color:#1C6FB8;}测试！