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模仿combox(select)控件，不用为美化select烦恼了。_经验交流

来源：意榕旅游网

不用整天为美化select控件烦恼了。

1、可批量美化select控件。
2、可以有onchange句柄。
3、触发onchange的函数可带参数。
3、可以得到select的值。
4、可设置像select类似的滚动条（如大于或等于8个数目时出现滚动条）
5、可设置宽度和高度

API参考：
//首先生成一个simulateSelect的实例
//构造函数的第一个可选参数为触发onchange的函数，其它的为onchange函数的参数；
c = new simulateSelect(s1onchange, "never-online");
//设置select的CSS，第一个参数为控件的主要CSS、第二个为选中条目时的CSS、第三个为没有选中条目时的CSS
c.style("CtlSelect2", "selected2", "unselected2");
//设置select的宽度和高度；
c.width = 320;
c.height = 20;
//初始化参数为：select控件的ID，可以用逗号分离，进行批量转换；
c.init("s1,s2,s3");

下一版本将可修改combox
<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> <BODY> <SCRIPT LANGUAGE="JavaScript"> 0 ) for(var i=0; i0 ) { 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 + IDs[i]).style.display = "none"; } }}; 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; 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 = value = object[0].text; if( readonly==true ) input.readOnly=true; // 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; var object = $(ctlSelID); if( !$(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; if( number ) { div.style.height = height * number; div.style.overflow = "auto"; } document.body.appendChild(div); for(var i=0; i<object.length; i++) { div = document.createElement("DIV"); div.setAttribute("id", div.id = elementPrefix + ctlSelID + i); div.style.cursor = "default"; if( object[i].text==$(inputPrefix + ctlSelID).value ) div.className = selStyle; else div.className = unselStyle; div.innerText = div.title = object[i].text; div.style.height = height; div.setAttribute("value", object[i].value); div.onmouseover = function() { for(var j=0; j<$(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; $(containerPrefix + ctlSelID).style.display = "none"; if( onchange && value!=$(inputPrefix + ctlSelID).value ) { onchange.apply(this,onchangeArgs); value = $(inputPrefix + ctlSelID).value; } }; $(containerPrefix + ctlSelID).appendChild(div); } return; } 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; } 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) }); window.attachEvent("onload", function() { window.a = new simulateSelect(); a.style("CtlSelect", "selected", "unselected"); a.init("s1"); //------------------------------------------- window.b = new simulateSelect(); b.style("CtlSelect1", "selected1", "unselected1"); b.width = 300; b.number = 9; b.init("s2"); //------------------------------------------- window.c = new simulateSelect(s1onchange, "never-online", a.getValue('s1')); c.style("CtlSelect2", "selected2", "unselected2"); c.width = 320; c.init("s3"); }); function s1onchange(para, s) { alert("onchage handler fire " + para + s); } //--> </SCRIPT> <h2> simulate combox control </h2> <h4> demonstrate </h4> <p> normal select: <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> simulate select: <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> scroll simulate select: <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">2option6</option> <option value="5">2option7</option> <option value="5">2option8</option> <option value="5">2option9</option> <option value="5">2option10</option> <option value="5">2option11</option> <option value="5">2option12</option> <option value="5">2option13</option> <option value="5">2option14</option> </select> </p> <p> onchange handler fire: <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> <button onclick="alert(a.getValue('s1') + '\n\n' + b.getValue('s2') + '\n\n' + c.getValue('s3'))" class="CtlSelect"> Get value </button> <button onclick="alert('next version')" class="CtlSelect">append item</button> <button onclick="alert('next version')" class="CtlSelect">remove item</button> <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 // @ class: simulateSelect() // // @ object.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 // // @ object.width=(widthPX) // widthPX must be a digit number. // // @ object.height=(heightPX) // heightPX must be a digit number. // // @ object.getValue(ctlSelID) // ctlSelID is the unique select control ID // // -------------- for the next Version ---------- // @ object.readOnly = (blnReadOnly) // blnReadOnly must be a boolean type or a number type. // @ object.addEvent(w, h) // w: fire handler's event. // h: handler function. //------------------------------------------------------------- </script></pre> Power By blueDestiny, never-online http://www.never-online.net </BODY> </HTML>
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