checkbox、select、radio的设置与获取

参考链接：http://www.cnblogs.com/xiaopin/archive/2011/09/13/2175190.html

js版本：

<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
</head>
<body>
复选框：
<input type="checkbox" name="checkbox1" value="1" checked/>1
<input type="checkbox" name="checkbox1" value="2"/>2
<input type="checkbox" name="checkbox1" value="3" checked/>3
<input type="checkbox" name="checkbox1" value="4"/>4
<input type="checkbox" name="checkbox1" value="5"/>5

<br/>

单选框：
<input type="radio" id="radio1" name="radio1" value="1" checked>1
<input type="radio" id="radio2" name="radio1" value="2">2
<input type="radio" id="radio3" name="radio1" value="3">3
<br/>
下拉框：
<select id="select1">
<option value="1">1</option>
<option value="2">2</option>
<option value="3">3</option>
</select>
<br/>

<button onclick="sub();">提交</button><br/>
<button onclick="fun1();">选择4，5复选框</button><button onclick="fun1_2()">全选</button><br/>
<button onclick="fun2();">选择3单选框</button><br/>
<button onclick="fun3();">选择2下拉框</button><br/>
<script type="text/javascript">
    function fun1() {
        //复选框设置值
        var oCheckbox = document.getElementsByName("checkbox1");
        var arr = [];
        var index = 0;
        for (var i = 0; i < oCheckbox.length; i++) {
            if (oCheckbox[i].value == 4 || oCheckbox[i].value == 5) {
                oCheckbox[i].checked = true;
            } else {
                oCheckbox[i].checked = false;
            }
        }
    }

    function fun1_2() {
        //复选框设置值
        var oCheckbox = document.getElementsByName("checkbox1");
        for (var i = 0; i < oCheckbox.length; i++) {
                oCheckbox[i].checked = true;
        }
    }

    function fun2() {
        //单选框设置值
        var oRadio = document.getElementsByName("radio1");
        for (var i = 0; i < oRadio.length; i++) {
            if (oRadio[i].value == 3) {
                oRadio[i].checked = true;
                break;
            }
        }
    }

    function fun3() {
        //下拉框设置值
        var oSelect = document.getElementById("select1");
        oSelect.value = 2;


        //由option的text来选中选中
        for (i = 0; i < oSelect.options.length; i++) {
            alert("Element " + i + " is " + oSelect.options(i).text +
            " and has the value " + oSelect.options(i).value);
        }
        oSelect.options(0).selected = true;
    }

    function sub() {
        //复选框获取值
        var oCheckbox = document.getElementsByName("checkbox1");
        var arr = [];
        var index = 0;
        for (var i = 0; i < oCheckbox.length; i++) {
            if (oCheckbox[i].checked) {
                arr[index++] = oCheckbox[i].value;
            }
        }
        alert("复选框：" + arr.toString());

        //单选框获取值
        var oRadio = document.getElementsByName("radio1");
        var rvalue = 0;
        for (var i = 0; i < oRadio.length; i++) {
            if (oRadio[i].checked) {
                rvalue = oRadio[i].value;
                break;
            }
        }
        alert("单选框：" + rvalue);

        //下拉框获取值
        var oSelect = document.getElementById("select1");
        alert("下拉框：" + oSelect.value);
    }
</script>
</body>
</html>

View Code

jQuery版本：

<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
    <script type="text/javascript" src="../js/jquery-1.10.2.js"></script>
</head>

<body>
复选框：
<input type="checkbox" name="checkbox1" value="1" checked/>1
<input type="checkbox" name="checkbox1" value="2"/>2
<input type="checkbox" name="checkbox1" value="3" checked/>3
<input type="checkbox" name="checkbox1" value="4"/>4
<input type="checkbox" name="checkbox1" value="5"/>5

<br/>

单选框：
<input type="radio" id="radio1" name="radio1" value="1" checked>1
<input type="radio" id="radio2" name="radio1" value="2">2
<input type="radio" id="radio3" name="radio1" value="3">3
<br/>
下拉框：
<select id="select1">
<option value="1">1</option>
<option value="2">2</option>
<option value="3">3</option>
</select>
<br/>

<button onclick="sub();">提交</button><br/>
<button onclick="fun1();">选择4，5复选框</button><br/>
<button onclick="fun2();">选择3单选框</button><br/>
<button onclick="fun3();">选择2下拉框</button><br/>
<script type="text/javascript">
    $(document).ready(function () {

    });
    function fun1() {
        //复选框设置值
        var oCheckbox = $("input[name=checkbox1]");
        var arr = [];
        var index = 0;
        for (var i = 0; i < oCheckbox.length; i++) {
            if (oCheckbox[i].value == 4 || oCheckbox[i].value == 5) {
                oCheckbox[i].checked = true;
            } else {
                oCheckbox[i].checked = false;
            }
        }
    }

    function fun2() {
        //单选框设置值
        var oRadio = $("input[name=radio1]");
        for (var i = 0; i < oRadio.length; i++) {
            if (oRadio[i].value == 3) {
                oRadio[i].checked = true;
                break;
            }
        }
    }

    function fun3() {
        //下拉框设置值
        var oSelect = $("#select1");
        oSelect.val(2);
    }

    function sub() {
        //复选框获取值
        var oCheckbox = $("input[name=checkbox1]");
        var arr = [];
        var index = 0;
        for (var i = 0; i < oCheckbox.length; i++) {
            if (oCheckbox[i].checked) {
                arr[index++] = oCheckbox[i].value;
            }
        }
        alert("复选框：" + arr.toString());

        //单选框获取值
        var oRadio = $("input[name=radio1]");
        var rvalue = 0;
        for (var i = 0; i < oRadio.length; i++) {
            if (oRadio[i].checked) {
                rvalue = oRadio[i].value;
                break;
            }
        }
        alert("单选框：" + rvalue);

        //下拉框获取值
        var oSelect = $("#select1");
        alert("下拉框：" + oSelect.val());
    }
</script>
</body>
</html>

View Code