js美化select下拉列表 -

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js美化select下拉列表

html css xhtml

近几天公司需要美化一个select下拉列表，在这记录下以便以后使用，js部分我已经封装成对象了，只用在html页面new 一下带上标签的name值就可以使用了，是不是很方便呢！select的样式大小图片背景都可以随意修改，只需要修改css样式就好了！

下面开始贴代码了：
html：

<!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=utf-8" />
<link href="css/base.css" rel="stylesheet" type="text/css"/>
<link href="css/importselect.css" rel="stylesheet" type="text/css"/>
<title>select dom</title>
<script type="text/javascript" src="js/importselect.js"></script>
<script type="text/javascript">
    window.onload=function (){
        new selectStyle('area_selet2');
        new selectStyle('area_selet1');
    };
</script>
</head>
<body>
    <div class="center">
        <div id="age_sel_2">
            <select name="area_selet2">
                <option value="请选择">请选择</option>
                <option value="ASP" >ASP</option>
                <option value="PHP" >PHP</option>
                <option value=".NET" >.NET</option>
            </select>
        </div>
    </div>
    <div class="center">
        <div id="age_sel_2">
            <select name="area_selet1">
                <option value="请选择">请选择</option>
                <option value="ASP" >ASP</option>
                <option value="PHP" >PHP</option>
                <option value=".NET" >.NET</option>
            </select>
        </div>
    </div>
</body>
</html>

下面是css样式部分：

html{background:#fff;}
.center{ margin-left:auto; margin-right:auto; margin-top:10px; width:300px;position:relative;}
#age_sel_2 div.tag_select{display:block;width:141px;height:36px;line-height:36px; float:left; color:#fff; text-align:center; font-size:12px;}
#age_sel_2 div.tag_select_hover{display:block;width:141px;height:36px;line-height:36px;float:left; color:#fff; text-align:center; font-size:12px;}
#age_sel_2 div.tag_select_open{display:block;color:#fff;width:141px;height:36px;line-height:36px;text-align:center;font-size:12px;float:left;}
#age_sel_2 ul.tag_options{width:136px;font-size:12px;color:#fff;line-height:36px;text-align:center;float:left;border:1px solid #37A2DA;border-top:0;background:#39A9FE;position:absolute;left:43px; top:33px;}
#age_sel_2 ul.tag_options li{display:block;width:136px;height:36px;text-decoration:none;}
#age_sel_2 ul.tag_options li.open_hover{background:#2174B7;color:#fff;}
#age_sel_2 ul.tag_options li.open_selected{background:#B2DBFC;color:#000;}
.select_box{background:url(../images/select02.gif) no-repeat;width:181px; height:36px;}
.select_txt{width:40px; height:36px;font-size:12px;color:#fff;line-height:36px;text-align:center;float:left;}
.select_fh{background:url(../images/select01.png) -17px 0 no-repeat;width:13px;height:16px;position:absolute;left:155px;top:11px;}
.select_fh_on{background:url(../images/select01.png) 0 0 no-repeat;width:16px;height:14px;position:absolute;left:155px;top:11px;}

下面是js部分：

function selectStyle(name){
    this.selects = document.getElementsByName(name);
    isIE = (document.all && window.ActiveXObject && !window.opera) ? true : false;
    this.rSelects();
};
     
selectStyle.prototype.stopBubbling=function (ev) { 
    ev.stopPropagation()
};
//定义$为获取id写法
function $(id) {
    return document.getElementById(id)
};
//加载dom元素
 selectStyle.prototype.rSelects=function () {
    for (i=0;i<this.selects.length;i++){
        this.selects[i].style.display = 'none';
        select_tag = document.createElement('div');
        select_tag.id = 'select_' + this.selects[i].name;
        select_tag.className = 'select_box';
        this.selects[i].parentNode.insertBefore(select_tag,this.selects[i]);
     
        select_text = document.createElement('div'); 
        select_text.className='select_txt';
        select_text.innerHTML='姓名';
        select_tag.appendChild(select_text);
        select_fh = document.createElement('div'); 
        select_fh.className='select_fh';
        select_fh.id='select_fh';
        select_tag.appendChild(select_fh);
     
        select_info = document.createElement('div'); 
        select_info.id = 'select_info_' + this.selects[i].name;
        select_info.className='tag_select';
        select_info.style.cursor='pointer';
        select_tag.appendChild(select_info);
        select_ul = document.createElement('ul'); 
        select_ul.id = 'options_' + this.selects[i].name;
        select_ul.className = 'tag_options';
        select_ul.style.position='absolute';
        select_ul.style.display='none';
        select_ul.style.zIndex='999';
        select_tag.appendChild(select_ul);
        this.rOptions(i,this.selects[i].name);
        this.mouseSelects(this.selects[i].name);
        if (isIE){
            this.selects[i].onclick = new Function("clickLabels3('"+this.selects[i].name+"');window.event.cancelBubble = true;");
        }
        else if(!isIE){
            this.selects[i].onclick = new Function("clickLabels3('"+this.selects[i].name+"')");
            this.selects[i].addEventListener("click", this.stopBubbling, false);
        }  
    }
}
 selectStyle.prototype.rOptions=function (i, name) {
    var _this=this;
    var options = this.selects[i].getElementsByTagName('option');
    var options_ul = 'options_' + name;
    for (n=0;n<this.selects[i].options.length;n++){ 
        option_li = document.createElement('li');
        option_li.style.cursor='pointer';
        option_li.index=n;
        option_li.className='open';
        $(options_ul).appendChild(option_li);
        option_text = document.createTextNode(this.selects[i].options[n].text);
        option_li.appendChild(option_text);
        option_selected = this.selects[i].options[n].selected;
        if(option_selected){
            option_li.className='open_selected';
            option_li.id='selected_' + name;
            $('select_info_' + name).appendChild(document.createTextNode(option_li.innerHTML));
        }
        option_li.onmouseover = function(){ this.className='open_hover';}
        option_li.onmouseout = function(){
            if(this.id=='selected_' + name){
                this.className='open_selected';
            }
            else {
                this.className='open';
            }
        } 
        option_li.onclick =function(){_this.clickOptions(i,this.index,_this.selects[i].name)};//new Function("this.clickOptions("+i+","+n+",'"+this.selects[i].name+"')");
    }
}
     
 selectStyle.prototype.mouseSelects=function (name){
    var _this=this;
    var sincn = 'select_info_' + name;
    if (isIE){
        $(sincn).onclick = function(){_this.clickSelects(name);window.event.cancelBubble=true;};// new Function("_this.clickSelects('"+name+"');window.event.cancelBubble = true;");
    }
    else if(!isIE){
        $(sincn).onclick = function(){_this.clickSelects(name)};
        $('select_info_' +name).addEventListener("click", this.stopBubbling, false);
    }
}
//点击下拉列表事件
 selectStyle.prototype.clickSelects=function (name){
    var sincn = 'select_info_' + name;
    var sinul = 'options_' + name; 
    for (i=0;i<this.selects.length;i++){ 
        if(this.selects[i].name == name){    
            if( $(sincn).className =='tag_select'){
                $(sincn).className ='tag_select_open';
                $(sinul).style.display = '';
            }
            else if( $(sincn).className =='tag_select_open'){
                $(sincn).className = 'tag_select';
                $(sinul).style.display = 'none';
            }
        }
        else{
            $('select_info_' + this.selects[i].name).className = 'tag_select';
            $('options_' + this.selects[i].name).style.display = 'none';
        }
    }
}
//选项点击事件
 selectStyle.prototype.clickOptions=function (i,n, name){
    var li = $('options_' + name).getElementsByTagName('li');
    $('selected_' + name).className='open';
    $('selected_' + name).id='';
    li[n].id='selected_' + name;
    li[n].className='open_hover';
    $('select_' + name).removeChild($('select_info_' + name));
    select_info = document.createElement('div');
    select_info.id = 'select_info_' + name;
    select_info.className='tag_select';
    select_info.style.cursor='pointer';
    $('options_' + name).parentNode.insertBefore(select_info,$('options_' + name));
    this.mouseSelects(name);
    $('select_info_' + name).appendChild(document.createTextNode(li[n].innerHTML));
    $( 'options_' + name ).style.display = 'none' ;
    $( 'select_info_' + name ).className = 'tag_select';
    this.selects[i].options[n].selected = 'selected';
}

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