js 动态 选中select option

夏高朗
2023-12-01
可以使用javascript和jQuery两种实现方式
1:使用javascript实现
<!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>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
<title>无标题文档</title>
</head>
<body>
<select name="jumpMenu" id="jumpMenu" onChange="jumpMenu('parent',this,0)">
   <option id="1" value="跳转URL">111</option>  //  111 是显示给用户的信息
   <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 = document.getElementById("jumpMenu").options;
   for (i=0; i<all_options.length; i++){
      if (all_options[i].id == optionID)  // 根据option标签的ID来进行判断  测试的代码这里是两个等号
      {
         all_options[i].selected = true;
      }
   }
};
display("4");
</script>
</body>
</html>
2:使用jQuery实现
<!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>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
<title>无标题文档</title>
</head>
<body>
<select name="jumpMenu" id="jumpMenu" >
   <option value="1">111</option>  //  111 是显示给用户的信息
   <option value="2">222</option>
   <option value="3">333</option>
   <option value="4">444</option>
   <option  value="5">555</option>
</select>
<script type="text/javascript" src="js/jquery1.8.3.min.js"></script>
<script type="text/javascript">
    $(function(){
           // $("#jumpMenu").val(要选中的option的value值即可);
         $("#jumpMenu").val(4);
    });
</script>
</body>
</html>

 

 类似资料: