这是以前收藏的用 js 实现美化单选，多选和下拉框的效果。
先上效果图：
Html代码：
<!DOCTYPE HTML> <html lang="en-US"> <head> <meta charset="UTF-8"> <title>checkbox and radio and select</title> <style type="text/css"> body{font:0.8em arial,sans-serif;} .checkbox,.radio{width:19px;height:25px;padding-right:5px;background:url(checkbox.gif) no-repeat;float:left;} .radio{background:url(radio.gif) no-repeat;} .select{position:absolute;width:158px;height:21px;padding:0 24px 0 8px;color:white;font:12px/21px arial,sans-serif;background:url(select.gif) no-repeat;overflow:hidden;} </style> </head> <body> <h1>Checkbox</h1> <p><input type="checkbox" name="checked" id="checked" class="styled"/><label for="checked">Checked</label></p> <h1>Radio</h1> <p><input type="radio" name="radio" id="yes" class="styled"/><label for="yes">Yes</label></p> <p><input type="radio" name="radio" id="no" class="styled"/><label for="no">No</label></p> <h1>Select</h1> <select class="styled" name="who"> <option selected="selected">Who</option> <option>What</option> <option>When</option> <option>Where</option> <option>How</option> </select> </body> </html> <script type="text/javascript" src="custom-form-elements.js"></script>
custom-form-elements.js代码：
View Code
/* CUSTOM FORM ELEMENTS Created by Ryan Fait www.ryanfait.com The only things you may need to change in this file are the following variables: checkboxHeight, radioHeight and selectWidth (lines 24, 25, 26) The numbers you set for checkboxHeight and radioHeight should be one quarter of the total height of the image want to use for checkboxes and radio buttons. Both images should contain the four stages of both inputs stacked on top of each other in this order: unchecked, unchecked-clicked, checked, checked-clicked. You may need to adjust your images a bit if there is a slight vertical movement during the different stages of the button activation. The value of selectWidth should be the width of your select list image. Visit http://ryanfait.com/ for more information. */ var checkboxHeight = "25"; var radioHeight = "25"; var selectWidth = "190"; /* No need to change anything after this */ document.write('<style type="text/css">input.styled { display: none; } select.styled { position: relative; width: ' + selectWidth + 'px; opacity: 0; filter: alpha(opacity=0); z-index: 5; } .disabled { opacity: 0.5; filter: alpha(opacity=50); }</style>'); var Custom = { init: function() { var inputs = document.getElementsByTagName("input"), span = Array(), textnode, option, active; for(a = 0; a < inputs.length; a++) { if((inputs[a].type == "checkbox" || inputs[a].type == "radio") && inputs[a].className == "styled") { span[a] = document.createElement("span"); span[a].className = inputs[a].type; if(inputs[a].checked == true) { if(inputs[a].type == "checkbox") { position = "0 -" + (checkboxHeight*2) + "px"; span[a].style.backgroundPosition = position; } else { position = "0 -" + (radioHeight*2) + "px"; span[a].style.backgroundPosition = position; } } inputs[a].parentNode.insertBefore(span[a], inputs[a]); inputs[a].onchange = Custom.clear; if(!inputs[a].getAttribute("disabled")) { span[a].onmousedown = Custom.pushed; span[a].onmouseup = Custom.check; } else { span[a].className = span[a].className += " disabled"; } } } inputs = document.getElementsByTagName("select"); for(a = 0; a < inputs.length; a++) { if(inputs[a].className == "styled") { option = inputs[a].getElementsByTagName("option"); active = option[0].childNodes[0].nodeValue; textnode = document.createTextNode(active); for(b = 0; b < option.length; b++) { if(option[b].selected == true) { textnode = document.createTextNode(option[b].childNodes[0].nodeValue); } } span[a] = document.createElement("span"); span[a].className = "select"; span[a].id = "select" + inputs[a].name; span[a].appendChild(textnode); inputs[a].parentNode.insertBefore(span[a], inputs[a]); if(!inputs[a].getAttribute("disabled")) { inputs[a].onchange = Custom.choose; } else { inputs[a].previousSibling.className = inputs[a].previousSibling.className += " disabled"; } } } document.onmouseup = Custom.clear; }, pushed: function() { element = this.nextSibling; if(element.checked == true && element.type == "checkbox") { this.style.backgroundPosition = "0 -" + checkboxHeight*3 + "px"; } else if(element.checked == true && element.type == "radio") { this.style.backgroundPosition = "0 -" + radioHeight*3 + "px"; } else if(element.checked != true && element.type == "checkbox") { this.style.backgroundPosition = "0 -" + checkboxHeight + "px"; } else { this.style.backgroundPosition = "0 -" + radioHeight + "px"; } }, check: function() { element = this.nextSibling; if(element.checked == true && element.type == "checkbox") { this.style.backgroundPosition = "0 0"; element.checked = false; } else { if(element.type == "checkbox") { this.style.backgroundPosition = "0 -" + checkboxHeight*2 + "px"; } else { this.style.backgroundPosition = "0 -" + radioHeight*2 + "px"; group = this.nextSibling.name; inputs = document.getElementsByTagName("input"); for(a = 0; a < inputs.length; a++) { if(inputs[a].name == group && inputs[a] != this.nextSibling) { inputs[a].previousSibling.style.backgroundPosition = "0 0"; } } } element.checked = true; } }, clear: function() { inputs = document.getElementsByTagName("input"); for(var b = 0; b < inputs.length; b++) { if(inputs[b].type == "checkbox" && inputs[b].checked == true && inputs[b].className == "styled") { inputs[b].previousSibling.style.backgroundPosition = "0 -" + checkboxHeight*2 + "px"; } else if(inputs[b].type == "checkbox" && inputs[b].className == "styled") { inputs[b].previousSibling.style.backgroundPosition = "0 0"; } else if(inputs[b].type == "radio" && inputs[b].checked == true && inputs[b].className == "styled") { inputs[b].previousSibling.style.backgroundPosition = "0 -" + radioHeight*2 + "px"; } else if(inputs[b].type == "radio" && inputs[b].className == "styled") { inputs[b].previousSibling.style.backgroundPosition = "0 0"; } } }, choose: function() { option = this.getElementsByTagName("option"); for(d = 0; d < option.length; d++) { if(option[d].selected == true) { document.getElementById("select" + this.name).childNodes[0].nodeValue = option[d].childNodes[0].nodeValue; } } } } window.onload = Custom.init;
PS：下拉框的效果在 ie6 下不兼容。附上下载地址。