美化下拉列表_JavaScript

来源：划拓汽车网

<HTML>
<HEAD>
<TITLE> simulate combox control - http://www.never-online.net </TITLE>
<META NAME="Generator" CONTENT="EditPlus">
<META NAME="Author" CONTENT="">
<META NAME="Keywords" CONTENT="">
<META NAME="Description" CONTENT="">
<style>
body, input
{
 font-family: verdana;
 font-size: 9pt;
}
h1
{
 font-family: tahoma;
 font-size: 22pt;
 text-align: left;
}
pre
{
 font-size: 9pt;
 font-family: verdana;
 border: 1px solid #006600;
 width: 400px;
 padding: 10px;
 background: #ffffff;
 color: #006600;
}
.CtlSelect
{
 border: 1px solid #006600;
 font-family: verdana;
 height: 20px;
 color: #006600;
 background: #ffffff;
 /*background:url({E5066804-650D-4757-9BA4-A92DB8817A18}0.jpg);*/
}
.selected
{
 background: #006600;
 color: #ffffff;
 height: 20px;
}
.unselected
{
 height: 20px;
 color: #006600;
 line-height: 120%;
 border-bottom: 1px solid #006600;
}
.CtlSelect1
{
 border: 1px solid #003399;
 font-family: verdana;
 height: 20px;
 color: #003399;
 background: #ffffff;
 /*background:url({E5066804-650D-4757-9BA4-A92DB8817A18}0.jpg);*/
}
.selected1
{
 background: #003399;
 color: #ffffff;
 height: 20px;
}
.unselected1
{
 height: 20px;
 color: #003399;
 line-height: 120%;
 border-bottom: 1px solid #003399;
}
.CtlSelect2
{
 border: 1px solid #990000;
 font-family: verdana;
 height: 20px;
 color: #990000;
 background: #ffffff;
 /*background:url({E5066804-650D-4757-9BA4-A92DB8817A18}0.jpg);*/
}
.selected2
{
 background: #990000;
 color: #ffffff;
 height: 20px;
}
.unselected2
{
 height: 20px;
 color: #990000;
 line-height: 120%;
 border-bottom: 1px solid #990000;
}
.copyright
{
 margin-top: 10px;
 font-size: 9pt;
 text-align: center;
 color: #333;
 font-weight: bold;
}
</style>
</HEAD></P>
<P><BODY>

<P>function $(objID)
{
 return document.getElementById(objID);
};
function Offset(e)
{
 var t = e.offsetTop;
 var l = e.offsetLeft;
 var w = e.offsetWidth;
 var h = e.offsetHeight-2;</P>
<P> while(e=e.offsetParent)
 {
 t+=e.offsetTop;
 l+=e.offsetLeft;
 }
 return {
 top : t,
 left : l,
 width : w,
 height : h
 }
}
//-----------------------------------------------
function simulateSelect() { with(this)
{
 this.IDs = [];
 this.name = this;
 // property for beta Version
 // can editable combox
 this.readonly = true;
 this.height = 20;
 this.width = null;
 this.ctlStyle = "CtlSelect";
 this.selStyle = "selected";
 this.unselStyle = "unselected";
 this.elementPrefix = "e__";
 this.inputPrefix = "i__";
 this.containerPrefix = "c__";
 this.buttonPrefix = "b__";
 return this;
}};
simulateSelect.prototype.init = function(ctlSelIDs) { with(this)
{
 eval(name).append(ctlSelIDs);
 eval(name).simulates();
}};</P>
<P>simulateSelect.prototype.style = function() { with(this)
{
 ctlStyle = arguments[0];
 selStyle = arguments[1];
 unselStyle = arguments[2];</P>
<P>}};
//-----------------------------------------------
simulateSelect.prototype.append = function(ctlSelIDs) { with(this)
{
 if( ctlSelIDs.indexOf(",")>0 )
 {
 var arrCtlSel = ctlSelIDs.split(",");
 for(var i=0; i-1 || 
 el.id.indexOf(inputPrefix)>-1 || 
 el.id.indexOf(containerPrefix)>-1 || 
 el.id.indexOf(buttonPrefix)>-1 )
 {
 return;
 }
 else
 {
 for(var i=0; i<eval(name).IDs.length; i++)
 if( $(containerPrefix + IDs[i]) )
 $(containerPrefix + eval(name).IDs[i]).style.display = "none";
 }</P>
<P>}};
simulateSelect.prototype.simulates = function() { with(this)
{
 for(var i=0; i<IDs.length; i++)
 eval(name).simulate(IDs[i]);
}};
simulateSelect.prototype.simulate = function(ctlSelID) { with (this)
{
 var input;
 var button;
 var object;
 var offset;</P>
<P> object = $(ctlSelID);
 offset = Offset(object);
 input = document.createElement("INPUT");
 button = document.createElement("BUTTON");
 button.setAttribute("id", buttonPrefix + ctlSelID);
 //button.value = "⊿";
 button.value = "6";
 button.style.fontFamily = "Webdings, Marlett";
 button.style.background = "";
 button.onclick = input.onclick = function()
 {
 this.blur();
 eval(name).expand(ctlSelID, offset);
 }
 input.onselectstart = function() { eval(name).expand(ctlSelID, offset); event.returnValue = false; };
 input.setAttribute("id", inputPrefix + ctlSelID);
 input.title = button.title = "click expand options";
 input.style.cursor = button.style.cursor = "default";
 input.className = button.className = ctlStyle;
 input.style.width = (width>0 ? width : object.offsetWidth);
 height ? input.style.height=button.style.height=height : "";
 input.value = object[0].text;
 if( readonly==true ) input.readOnly=true;</P>
<P> // this method is only IE.
 object.insertAdjacentElement("afterEnd",button);
 object.insertAdjacentElement("afterEnd",input);
 object.style.display = 'none';
}};
simulateSelect.prototype.expand = function(ctlSelID, offset) { with(this)
{
 var div, btn_off;
 var object = $(ctlSelID);</P>
<P> if( !$(containerPrefix + ctlSelID) )
 {
 div = document.createElement("DIV");
 div.style.position = "absolute";
 div.style.display = "block";
 div.setAttribute("id", containerPrefix + ctlSelID);
 div.className = ctlStyle;
 div.style.left = offset.left;
 div.style.top = offset.top + offset.height;
 div.style.width = (width ? width : offset.width) + 20;
 div.style.height = offset.height;
 document.body.appendChild(div);</P>
<P> for(var i=0; i<object.length; i++)
 {
 div = document.createElement("DIV");
 div.setAttribute("id", div.id = elementPrefix + ctlSelID + i);
 div.style.cursor = "default";</P>
<P> if( object[i].text==$(inputPrefix + ctlSelID).value )
 div.className = selStyle;
 else
 div.className = unselStyle;</P>
<P> div.innerText = div.title = object[i].text;
 div.style.height = height;
 div.setAttribute("value", object[i].value);</P>
<P> div.onmouseover = function()
 {
 for(var j=0; j<$(containerPrefix + ctlSelID).childNodes.length; j++)
 {
 if($(containerPrefix + ctlSelID).childNodes[j]==this)
 $(containerPrefix + ctlSelID).childNodes[j].className = selStyle;
 else
 $(containerPrefix + ctlSelID).childNodes[j].className = unselStyle;
 } 
 };
 div.onclick = function()
 {
 $(inputPrefix + ctlSelID).value = this.innerText;
 $(containerPrefix + ctlSelID).style.display = "none";
 };
 $(containerPrefix + ctlSelID).appendChild(div);
 }
 return;
 }</P>
<P> if( $(containerPrefix + ctlSelID).style.display=="none" )
 {
 for(var i=0; i<object.length; i++)
 {
 if( object[i].text==$(inputPrefix + ctlSelID).value )
 $(elementPrefix + ctlSelID + i).className = selStyle;
 else
 $(elementPrefix + ctlSelID + i).className = unselStyle;
 }
 $(containerPrefix + ctlSelID).style.display="block";
 return;
 }</P>
<P> if( $(containerPrefix + ctlSelID).style.display=="block" )
 {
 $(containerPrefix + ctlSelID).style.display="none";
 return;
 }
}};
simulateSelect.prototype.getValue = function(ctlSelID) { with(this)
{
 if( $(inputPrefix + ctlSelID) )
 return $(inputPrefix + ctlSelID).value;
 else
 return null;
}};
simulateSelect.prototype.addEvent = function(w, h) { with(this)
{
}};
//-----------------------------------------------
//window.onerror = Function("return true;");
// IE only.
document.attachEvent("onmousedown", function() {
 a.checkupOnMouseDown(event);
 b.checkupOnMouseDown(event);
 c.checkupOnMouseDown(event)
 }
 );
//-->

<h2> simulate combox control </h2>
<h4> demonstrate </h4></P>
<P><p>
<select id="s0">
<option value="- please select your options -"> - please select your options -</option>
<option value="1">option1</option>
<option value="2">option2</option>
<option value="3">option3</option>
<option value="4">option4</option>
<option value="5">option5</option>
</select>
</p></P>
<P><p>
<select id="s1">
<option value="- please select your options -"> - please select your options -</option>
<option value="1">1option1</option>
<option value="2">1option2</option>
<option value="3">1option3</option>
<option value="4">1option4</option>
<option value="5">1option5</option>
</select>
</p></P>
<P><p>
<select id="s2">
<option value="- please select your options -"> - please select your options -</option>
<option value="1">2option1</option>
<option value="2">2option2</option>
<option value="3">2option3</option>
<option value="4">2option4</option>
<option value="5">2option5</option>
</select>
</p></P>
<P><p>
<select id="s3">
<option value="- please select your options -"> - please select your options -</option>
<option value="1">3option1</option>
<option value="2">3option2</option>
<option value="3">3option3</option>
<option value="4">3option4</option>
<option value="5">3option5</option>
</select>
</p></P>
<P><button onclick="alert(a.getValue('s1') + '\n\n' + b.getValue('s2'))" class="CtlSelect"> Get value </button></P>
<P>

</P>
<P><h4> description </h4>
<pre class="brush:php;toolbar:false">
//-------------------------------------------------------------
// @ Module: simulate select control, IE only.
// @ Debug in: IE 6.0
// @ Script by: blueDestiny, never-online
// @ Updated: 2006-3-22
// @ Version: 1.0 apha
// @ Email: blueDestiny [at] 126.com
// @ Website: http://www.never-online.net
// @ Please Hold this item please.
//
// API
// @ simulateSelect(ctlSelIDs)
// ctlSelIDs: select control IDs, split by ","
//
// @ simulateSelect.style(ctlStyle[,selStyle][,unselStyle])
// ctlStyle: main control combox css class name
// selStyle: when mouseover or option focus css class name
// unselStyle: options blur's css class name
//
// @ simulateSelect.width=(widthPX)
// widthPX must be a digit number.
//
// @ simulateSelect.height=(heightPX)
// heightPX must be a digit number.
//
// -------------- for the next Version ----------
// @ simulateSelect.readOnly = (blnReadOnly)
// blnReadOnly must be a boolean type or a number type.
// @ simulateSelect.addEvent(w, h)
// w: fire handler's event.
// h: handler function.
//-------------------------------------------------------------
</pre></P>
<P>
Power By blueDestiny, never-online
http://www.never-online.net

</BODY>
</HTML>

[Ctrl+A 全选注:如需引入外部Js需刷新才能执行]