javascript获取select值_js怎么获取select选项-CSDN博客

本文链接：https://blog.csdn.net/longzhoufeng/article/details/70466512

javascript获取select值

<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>javascript获取select值</title>
</head>
<script>
    //javascript获取选中select值
    /*
        var obj = document.getElementById("testSelect"); //定位id
        var index = obj.selectedIndex; // 选中索引
        var text = obj.options[index].text; // 选中文本
        var value = obj.options[index].value; // 选中值
    */

    //jQuery获取选中select值
    /*
        $('#testSelect option:selected').text();//选中的文本
        $('#testSelect option:selected') .val();//选中的值
        $("#testSelect ").get(0).selectedIndex;//索引
    */

    window.onload=function() {
        var oBtn=document.getElementById("oBtn1");
        var oText=document.getElementById("oText1");
        var oSelect=document.getElementById("select1");
        var index=oSelect.selectedIndex ;
        oBtn.onclick=function() {
            alert(oSelect.options[index].text);
            if(oText.value==""){
                alert("请输入内容")
            }else{
                alert(oText.value+"----"+oSelect.options[oSelect.selectedIndex].text)
            }
        }
    }
</script>
<body>
<input id="oText1" type="text" value=""/>
<input id="oBtn1" type="button" value="按钮"/>
<select id="select1">
    <option value="1">广州</option>
    <option value="2">上海</option>
    <option value="3">北京</option>
</select>
</body>
</html>