JQuery SELECT单选模拟jQuery.select.js-原创手记-慕课网

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
复制代码代码如下:

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></h4><span class="FixSelectBrowserSpan"></span><ul 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;i<t.length;i++){
if(t[i].className=='commonselect'){
s[j] = t[i];
j++;
}
}
if(j==0)return;
var k = m = null;
for(var i=0;i<s.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
复制代码代码如下:

<!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" />
<title>JQuery 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">
<h1>Jquery 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>