4 <option value="a">bb</option> 5 <option value="c">cc</option> 6 </select> 7 <script type="text/javascript"> 8 document.getElementById('btn').onclick=function(){ //点击按钮,让第二个选项选中 9 var options = document.getElementById('select').children; 10 options[1].selected=tr...
<input type="hidden" value="3" id="selectval"> JS: varselectval= document.getElementById("selectval").value;varselectid = document.getElementById("setvalue");for(i=0;i<selectid.length;i++){if(selectid[i].value==selectval) selectid[i].selected=true; }...
options[item].selected= "selected";break; } } }//设置选中值--- 利用selectedindex属性 会取消之前的选择项functionsetSelectIndex(value1) {varcity = document.getElementById("city");for(vari=0;i < city.options.length; i++) {if(city.options[i].value ==value1) { city.selectedIndex=i;break...
<option id="2" value="跳转URL">222</option> <option id="3" value="跳转URL">333</option> <option id="4" value="跳转URL">444</option> <option id="5" value="跳转URL">555</option> </select> <script type="text/javascript"> function display(optionID){ var all_options...
let value = event.target.value; this.setState({ disabled: value == '2' }); } render() { return ( <div> <select ref="selectOption" onChange={(e) => this.handleChange(e)}> <option selected value="1" >Option 1</option>
value="3">Option 3</option> </select> <script> // 假设我们要选中值为"2"的选项 function setSelectedOption(selectId, valueToSelect) { const selectElement = document.getElementById(selectId); for (let i = 0; i < selectElement.options.length; i++) { if (selectElement.options[i]....
// 通过值设置选中项document.getElementById("mySelect").value="option2"; 1. 2. 上述代码将具有值为"option2"的选项设为选中状态。 完整示例 下面是一个完整的示例,演示如何使用JavaScript设置<select>元素的选中状态。 <!DOCTYPEhtml><html><head><title>Set Selected Option with JavaScript</title></head...
JavaScript获取select中text值的方法 本文实例讲述了JavaScript获取select中text值的方法。分享给大家供大家参考,具体如下: 别的不说,先看代码: 方法一: <select name=parent_id onchange=setTitleAndLinkByGoodsCategory(this.value,this.options[this.selectedIndex].text); ><optio ...
if(select.options[i].innerHTML == typeValue){ select.options[i].selected = true; break; } } } 2js如何设置radio选中 function setRadioChecked(){ var radioValue=document.getElementById("state").value; if(radioValue=="生效"){ $("#stateon").attr("checked","checked"); $("...
Deselect all items previously selected. 1 <code data-language="javascript" class="rainbow" style="padding: 0px; font-family: Monaco, courier, monospace; font-size: 12px; color: inherit; border-radius: 3px; border: 0px; background-color: transparent;"><span class="selector" style="color...