jquery彈出窗口麻煩

我使用這個jquery函數來顯示一個彈出窗口。在這段代碼中，它對於帶有CSS標識的段落或div屬性可以正常工作。但我想在我的html文件中多次使用它，所以我需要將ID轉換爲類。這裏是我的js文件：jquery彈出窗口麻煩

//0 means disabled; 1 means enabled; 
var popupStatus = 0; 

//loading popup with jQuery magic! 
function loadPopup(){ 
    //loads popup only if it is disabled 
    if(popupStatus==0){ 
     $("#backgroundPopup").css({ 
      "opacity": "0.7" 
     }); 
     $("#backgroundPopup").fadeIn("slow"); 
     $("#popupContact").fadeIn("slow"); 
     popupStatus = 1; 
    } 
} 

//disabling popup with jQuery magic! 
function disablePopup(){ 
    //disables popup only if it is enabled 
    if(popupStatus==1){ 
     $("#backgroundPopup").fadeOut("slow"); 
     $("#popupContact").fadeOut("slow"); 
     popupStatus = 0; 
    } 
} 

//centering popup 
function centerPopup(){ 
    //request data for centering 
    var windowWidth = document.documentElement.clientWidth; 
    var windowHeight = document.documentElement.clientHeight; 
    var popupHeight = $("#popupContact").height(); 
    var popupWidth = $("#popupContact").width(); 
    //centering 
    $("#popupContact").css({ 
     "position": "absolute", 
     "top": windowHeight/2-popupHeight/3.25, 
     "left": windowWidth/2-popupWidth/2 
    }); 
    //only need force for IE6 

    $("#backgroundPopup").css({ 
     "height": windowHeight 
    }); 

} 


//CONTROLLING EVENTS IN jQuery 
$(document).ready(function(){ 

    //LOADING POPUP 
    //Click the button event! 
    $("#button").click(function(){ 
     //centering with css 
     centerPopup(); 
     //load popup 
     loadPopup(); 
    }); 

    //CLOSING POPUP 
    //Click the x event! 
    $("#popupContactClose").click(function(){ 
     disablePopup(); 
    }); 
    //Click out event! 
    $("#backgroundPopup").click(function(){ 
     disablePopup(); 
    }); 
    //Press Escape event! 
    $(document).keypress(function(e){ 
     if(e.keyCode==27 && popupStatus==1){ 
      disablePopup(); 
     } 
    }); 

});

這裏是CSS：

#backgroundPopup{ 
display:none; 
position:fixed; 
_position:absolute; /* hack for internet explorer 6*/ 
height:100%; 
width:100%; 
top:0; 
left:0; 
background:#000000; 
border:1px solid #cecece; 
z-index:1; 
} 
#popupContact{ 
display:none; 
position:fixed; 
_position:absolute; /* hack for internet explorer 6*/ 
width:470px; 
background:#FFFFFF; 
border:2px solid #cecece; 
z-index:2; 
padding:12px; 
font-size:13px; 
} 
#popupContact h1{ 
text-align:left; 
color:#6FA5FD; 
font-size:22px; 
font-weight:700; 
border-bottom:1px dotted #D3D3D3; 
padding-bottom:2px; 
margin-bottom:20px; 
} 
#popupContactClose{ 
font-size:14px; 
line-height:14px; 
right:6px; 
top:4px; 
position:absolute; 
color:#6fa5fd; 
font-weight:700; 
display:block; 
cursor: pointer; 
} 
#button{ 
text-align:left; 
}

這裏是HTML：

<div id="button"><input type="submit" value="submit" /></div> 
<div id="popupContact"> 
     <a id="popupContactClose">x</a> 
     <h1>Description</h1> 
     <p id="contactArea"> 
      <?php echo $data['description'];?> 
     </p> 
</div> 
<div id="backgroundPopup"></div>

它完美的作品，當它被設置爲DIV用css id.but現在，如果我將所有'＃'更改爲'。以使id成爲類，它不起作用。如何使它工作？

來源

2012-02-16 Shabib