jQuery 取值操作

• 模板使用：

  https://startbootstrap.com/themes/sb-admin-2/
  
  使用的 bootstrap 模块 ，上面的这个网站可以下载

• select 取值

  <select class="com1_bandrate" id="com1_bandrate"  name=""  onchange="show_com1()">
  <option   value="2400">2400</option>
  <option   value="115200">115200</option>
  <option   value="460800">460800</option>
   </select>
  
  <script type="text/javascript">
  function show_com1(){
  	console.log(($("#com1_bandrate").find("option:selected").val()));
  }
  function show_com2(){
  	console.log(($("#com2_bandrate").find("option:selected").val()));
  }
  
  </script>
  

  select 取值，可以直接使用 $("#id").find("option.selected").val() 进行取值。

• text 取值

      <input type="text" class="mb-4 form-control form-control-user" id="eth0_ip" placeholder="IP">
      <input type="text" class="mb-4 form-control form-control-user" id="eth0_gateway" placeholder="Gateway">
      <input type="text" class="mb-4 form-control form-control-user" id="eth0_netmask" placeholder="netmask">
       <input type="text" class="mb-4 form-control form-control-user" id="eth0_dns" placeholder="DNS">
  
      <script type="text/javascript">
  function save_func(){
  	console.log(($("#eth0_ip").val()))
  	console.log(($("#eth0_netmask").val()))
  	console.log(($("#eth0_gateway").val()))
  	console.log(($("#eth0_dns").val()))
  
  	console.log(($("#eth1_ip").val()))
  	console.log(($("#eth1_netmask").val()))
  	console.log(($("#eth1_gateway").val()))
  	console.log(($("#eth1_dns").val()))
  }
  
  function eth0_mode(){
  	console.log(($("#eth0_mode_id").find("option:selected").val()));
  	var eth_mode = $("#eth0_mode_id").find("option:selected").val();
  	if (eth_mode == "static")
  	{
  		$("#eth0_ip").removeAttr("readonly");
  		$("#eth0_netmask").removeAttr("readonly");
  		$("#eth0_gateway").removeAttr("readonly");
  		$("#eth0_dns").removeAttr("readonly");
  	}
  	else
  	{
  		$("#eth0_ip").attr("readonly", "readonly");
  		$("#eth0_netmask").attr("readonly", "readonly");
  		$("#eth0_gateway").attr("readonly", "readonly");
  		$("#eth0_dns").attr("readonly", "readonly");
  	}
  }
  function eth1_mode(){
  	console.log(($("#eth1_mode_id").find("option:selected").val()));
  	var eth_mode = $("#eth1_mode_id").find("option:selected").val();
  	if (eth_mode == "static")
  	{
  		$("#eth1_ip").removeAttr("readonly");
  		$("#eth1_netmask").removeAttr("readonly");
  		$("#eth1_gateway").removeAttr("readonly");
  		$("#eth1_dns").removeAttr("readonly");
  	}
  	else
  	{
  		$("#eth1_ip").attr("readonly", "readonly");
  		$("#eth1_netmask").attr("readonly", "readonly");
  		$("#eth1_gateway").attr("readonly", "readonly");
  		$("#eth1_dns").attr("readonly", "readonly");
  	}
  
  }
  
  </script>