JQuerySELECT单选模拟jQuery.select.js_jquery

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('

');
$('#'+selectId+' > div > h4').empty().append($('#'+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+'
');
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+'
');
$('#'+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+'
');
__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+'
');
$('#'+selectId+' > div > ul > li').removeClass("over");
if (selectIndex == 0){
selectIndex = 0;
}else{
selectIndex--;
};
//$('#value2').append('向上改变的aa值：'+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('向下改变的aa值：'+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+'
');
$('.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("

"+$(this).text()+"

");
});
$('#'+sID+' > div > h4').empty().append($('#'+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 if(t[i].className=='commonselect'){
s[j] = t[i];
j++;
}
}
if(j==0)return;
var k = m = null;
for(var i=0;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: