基于jQuery JavaScript Library v1.3.2 的单选模拟
(本文件是跟据 zhangjingwei 的Jquery Select(单选) 模拟插件 V1.3.4 修改而来的)
a. 修改的主要原因是，原来的zhangjingwei的模拟在显示方式上的问题。在跟文字交替出现时会出现错位。现将模拟DIV的display修改为inline方式。更自然的嵌入到文本行中。
b.在加载文件后自动转化样式名为'commonselect' 的select。简化调用
c.对select的onchange()事件的响应。以及宽度获取的小调整
jquery.select.js
代码如下:
/*
* jQuery.select.js
*/
jQuery.fn.sSelect = function(){
var selectId = $(this).attr('id');
var selectZindex = $(this).css('z-index');
var selectIndex = $('#'+selectId+' select option').index($('#'+selectId+' select option:selected')[0]);
$('#'+selectId).append('div class="dropselectbox"h4/h4span class="FixSelectBrowserSpan"/spanul style="display:none" style="display:none"li/li/ul/div');
$('#'+selectId+' div h4').empty().append($('#'+selectId+' select option:selected').text());
$('.dropselectbox').css("display", 'block');

//取select的宽度 优先级 select样式中的宽度 - select自动的宽度 - 默认为60
var selectcssWidth = $('#'+selectId+' select').css('width');
selectcssWidth = typeof(selectcssWidth) =='undefined' ？ 0 : parseInt(selectcssWidth.replace('px','')) +5 ;
var selectWidth = selectcssWidth ？ selectcssWidth : ( $('#'+selectId+' select').width() 0 ？ $('#'+selectId+' select').width() + 5 : 60);
$('#'+selectId).css("margin-right",selectWidth);//修改偏移量
$('#'+selectId+' div h4').css("width", selectWidth); //将原select的宽度赋值给生成的select（并不是h4的总宽度）
$('#'+selectId+' div ul').css("width",selectWidth); //将h4的总宽度赋值给Ul
$('#'+selectId+' select').hide();
$('#'+selectId+' div').hover(function(){
$('#'+selectId+' div h4').addClass("over");
$('#'+selectId+' div span').addClass("over");
},function(){
$('#'+selectId+' div h4').removeClass("over");
$('#'+selectId+' div span').removeClass("over");
});
$('#'+selectId)
.bind("focus",function(){
__clearSelectMenu();
$('#'+selectId+' div h4').addClass("over");
$('#'+selectId+' div span').addClass("over");
})
.bind("click",function(e){
//$('#value2').append('点击：'+selectIndex+' br');
if($('#'+selectId+' div ul').css("display") == 'block'){
__clearSelectMenu(selectId);
return false;
}else{
if ($.browser.opera){__clearSelectMenu();}
$('#'+selectId+' div h4').addClass("current");
$('#'+selectId+' div span').addClass("over").addClass("current");
$('#'+selectId+' div ul').show();
var selectZindex = $(this).css('z-index');
if ($.browser.msie || $.browser.opera){
$('.dropdown').removeClass('overclass');
}
$('#'+selectId).addClass('overclass');
__setSelectValue(selectId);
var windowspace = ($(window).scrollTop() + document.documentElement.clientHeight) - $(this).offset().top;
var ulspace = $('#'+selectId+' div ul').outerHeight(true);
var windowspace2 = $(this).offset().top - $(window).scrollTop() - ulspace;
if (windowspace ulspace && windowspace2 0) {
$('#'+selectId+' div ul').css({top:-ulspace});
}else{
$('#'+selectId+' div ul').css({top:$('#'+selectId+' div h4').outerHeight(true)});
}
selectIndex = $('#'+selectId+' div ul li').index($('.selectedli')[0]);
$(window).scroll(function(){
var windowspace = ($(window).scrollTop() + document.documentElement.clientHeight) - $('#'+selectId).offset().top;
var ulspace = $('#'+selectId+' div ul').outerHeight(true);
if (windowspace ulspace) {
$('#'+selectId+' div ul').css({top:-ulspace});
}else{
$('#'+selectId+' div ul').css({top:$('#'+selectId+' div h4').outerHeight(true)});
}
});
//响应鼠标点击选择
$('#'+selectId+' div ul li').click(function(e){
selectIndex = $('#'+selectId+' div ul li').index(this);
//$('#value2').append('鼠标点击：'+selectIndex+' br');
$('#'+selectId+' select')[0].selectedIndex = selectIndex;
$('#'+selectId+' div h4').empty().append($('#'+selectId+' select option:selected').text());
__clearSelectMenu(selectId,selectZindex);
e.stopPropagation();
e.cancelbubble = true;
//SELECT onchange 事件
$('#'+selectId+' select').change();
})
.hover(
function(){
$('#'+selectId+' div ul li').removeClass("over");
$(this).addClass("over").addClass("selectedli");
selectIndex = $('#'+selectId+' div ul li').index(this);
},
function(){
$(this).removeClass("over");
}
);
//End
};
e.stopPropagation();
})
.bind("mousewheel",function(){
//以后也许支持滚轮
/*$('#'+selectId+' div ul li').hover(
function(){
return false;
},
function(){
return false;
}
);*/
})
.bind("dblclick", function(){
__clearSelectMenu();
return false;
})
.bind("keydown",function(e){
//var hotkeys = e.keyCode;
$(this).bind('keydown',function(e){
if (e.keyCode == 40 || e.keyCode == 38 || e.keyCode == 35 || e.keyCode == 36){
return false;
}
});
switch(e.keyCode){ //设置为true可给定case范围
case 9:
return true;
break;
case 13:
//enter
//$('#value2').append('按回车收到的值：'+selectIndex+' br');
__clearSelectMenu();
break;
case 27:
//esc
__clearSelectMenu();
break;
case 33:
$('#'+selectId+' div ul li').removeClass("over");
selectIndex = 0;
__keyDown(selectId,selectIndex);
break;
case 34:
$('#'+selectId+' div ul li').removeClass("over");
selectIndex = ($('#'+selectId+' select option').length - 1);
__keyDown(selectId,selectIndex);
break;
case 35:
$('#'+selectId+' div ul li').removeClass("over");
selectIndex = ($('#'+selectId+' select option').length - 1);
__keyDown(selectId,selectIndex);
break;
case 36:
$('#'+selectId+' div ul li').removeClass("over");
selectIndex = 0;
__keyDown(selectId,selectIndex);
break;
case 38:
//up
//$('#value2').append('原始值：'+selectIndex+' br');
$('#'+selectId+' div ul li').removeClass("over");
if (selectIndex == 0){
selectIndex = 0;
}else{
selectIndex--;
};
//$('#value2').append('span style="color:red;" style="color:red;"向上改变的aa值：/span'+selectIndex+' ');
__keyDown(selectId,selectIndex);
break;
case 40:
//down
//$('#value2').append('传递过来的：'+selectIndex+' ');
$('#'+selectId+' div ul li').removeClass("over");
if (selectIndex == ($('#'+selectId+' select option').length - 1)){
selectIndex = $('#'+selectId+' select option').length - 1;
}else{
selectIndex ++;
};
//$('#value2').append('span style="color:blue;" style="color:blue;"向下改变的aa值：/span'+selectIndex+' ');
__keyDown(selectId,selectIndex);
break;
/*case ((hotkeys 47 && hotkeys 59) || (hotkeys 64 && hotkeys 91) || (hotkeys 96 && hotkeys 123)):
//首字幕查询预留接口
//character = String.fromCharCode(hotkeys).toLowerCase();
return false;
break;*/
default:
return false;
break;
};
})
.bind("blur",function(){
__clearSelectMenu(selectId,selectZindex);
return false;
});
//禁止选择
$('.dropselectbox').bind("selectstart",function(){
return false;
});
};
function __clearSelectMenu(selectId,selectZindex){
//$('#value2').append('移除焦点：'+selectIndex+' br');
$('.dropselectbox ul').empty().hide();
$('.dropselectbox h4').removeClass("over").removeClass("current");
$('.dropselectbox span').removeClass("over");
$('#'+selectId).removeClass('overclass');
}
function __setSelectValue(sID){
$('#'+sID+' div ul').empty();
$.each($('#'+sID+' select option'), function(i){
$('#'+sID+' div ul').append("li class='FixSelectBrowser'"+$(this).text()+"/li");
});
$('#'+sID+' div h4').empty().append($('#'+sID+' select option:selected').text());
$('#'+sID+' div ul li').eq($('#'+sID+' select')[0].selectedIndex).addClass("over").addClass("selectedli");
}
function __keyDown(sID,selectIndex){
$('#'+sID+' select')[0].selectedIndex = selectIndex;
$('#'+sID+' div ul li:eq('+selectIndex+')').toggleClass("over");
$('#'+sID+' div h4').empty().append($('#'+sID+' select option:selected').text());
//SELECT onchange 事件
$('#'+sID+' select').change();
}
/* 自动调用 */
$(document).ready(function(){
var s = new Array();
var t = document.getElementsByTagName('select');
var j = 0;
for(var i=0;it.length;i++){
if(t[i].className=='commonselect'){
s[j] = t[i];
j++;
}
}
if(j==0)return;
var k = m = null;
for(var i=0;is.length;i++){
k = s[i].parentNode;
m = createDiv(k, i);
//s[i].replaceNode(m);
k.replaceChild(m,s[i])
m.appendChild(s[i]);
$('#selectbox'+ i).sSelect();
}
function createDiv(p, i){
var div = document.createElement('div');
div.className = 'dropdown';
div.id = 'selectbox' + i;
div.innerHTML = ' ';
p.appendChild(div);
return div;
}
})

HTML应用
代码如下:
!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" /
titleJQuery SELECT单选模拟/title
style type="text/css" bogus="1"
body,div,ul,h4,li {margin:0; padding:0; border:none; list-style:none; font-size:1;}
/*下拉列表select的commonselect样式 配合jquery.select插件 */
/* select style */
.dropdown {outline:none;z-index:1;display:inline-block;*display:inline; position:relative;}
.dropdown * {-moz-user-select:none;}
.dropselectbox{float:left; position:absolute}
.overclass{ z-index:999} /* 对于IE下层定位问题的修正样式 */
.dropdown h4{position:relative;cursor:default; text-indent:5px;text-align:left;display:block;overflow:visible; margin:0; height:20px;font:12px/21px Arial, Helvetica, sans-serif; border:solid 1px #AAA; background:#3B3936 ;color:#CEBC7E;padding-left:0px;}
.dropdown h4.over{border-color:#369;}
.dropdown h4.current{border-color:#003;}
.dropdown div {display:none;position:absolute; left:0px; top:0px;}
.dropdown span {position:absolute;top:4px; right:3px; background:url(ico.gif) no-repeat center; width:16px; height:14px;}
.dropdown ul{position:absolute;display:none;border:1px solid #AAA; background:#333;color:#8E867B;}
.dropdown ul li{text-indent:5px;background:#333;height:19px;display:block;cursor:default;font:400 12px/19px Arial, Helvetica, sans-serif;text-align:left;}
.dropdown ul li.over{background:#369; color:#FFF;}
/* select style */
/* input style */
input.txt{border:solid 1px #AAA; background:#3B3936 ;color:#CEBC7E; height:18px;line-height:18px;}
/style
script type="text/javascript" src="jquery132.js" src="jquery132.js"/script
script type="text/javascript" src="jquery.select.js" src="jquery.select.js"/script
/head
body style="background:none" style="background:none"
h1Jquery Select(单选) 模拟插件 V1.3.4/h1
form action="#" method="post" style="margin:10px;" style="margin:10px;"
类型：
select name="type" class="commonselect" id="test"
option value=""/option
option value="男"类型男/option
option value="女"类型女/option
/select
性别:
select name="sex" style="width:100px" onchange="alert(this.value);"
option value=""性别：/option
option value="男"男/option
option value="女"女/option
/select
input type="text" size="8" class="txt" name='input'
input type="submit" id="postform" value="提交表单" style="border:1px solid #000; height:23px; margin-left:20px;" /
/form
/body
/html

可以参考这篇文档http://www.jb51.net/jiaoben/21397.html