JS get the Drop-down box to display the value and judge the radio button method _javascript tips

The example of this article tells JS to get the Drop-down box display value and judge the radio button method. Share to everyone for your reference. Specifically as follows:

1. I have done many projects, need to get the value of the Select component display. Here are some of the methods I use frequently:

HTML source code is as follows:

The JS function is as follows:

function Settxt ()
{
 var _selobj=document.getelementbyidx_xx (' Province ');//Remove the element var of the Pull box
 _selval=_ selobj[_selobj.selectedindex].text;//Remove the selected value
 document.getelementbyidx_xx (' Provincename ') of the Drop-down box. Value=_selVal;

2. I have also done a lot to determine whether the radio radio button is selected, the following is my common method:

HTML page source code is as follows:

Function judge ()
{var status =false;
 var _radobj=document.getelementsbyname (' time ');
 for (var i =0;i<_radobj.length;i++) {
  if (_radobj[i].checked) {
  status=true
  }}
 }
 if (! Status) {
  alert (' Unselected time! ');
 }
 return status;
}

I hope this article will help you with your JavaScript programming.