【javascript】js 美化单选，多选和下拉框

最新推荐文章于 2025-08-06 14:36:16 发布

转载最新推荐文章于 2025-08-06 14:36:16 发布 · 111 阅读

文章标签：

#javascript #ViewUI

本文展示如何使用JS为单选、多选和下拉框添加美化效果，包括HTML代码和相关CSS样式。尽管在IE6下存在兼容性问题，但提供了详细的代码实现和解决方案。

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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;