JS gets radio selected value example code

Use js to get the selected value of the radio, which is often used on the submission page. At the same time, it also introduces how to get the value of the radio without selecting it.

Example,

<script> </li>
<li>var chk = 0; </li>
<li>window.onload=function (){ </li>
<li>var chkObjs = document.getElementsByName("radio"); </li>
<li>for(var i=0;i<chkObjs .length;i++){ <li>if(chkObjs[i].checked){ <li>chk = i; <li>break; <li>} <li>} <li>} <li>function check_radio(){ <li>var chkObjs = document.getElementsByName("radio"); <li>for(var i=0;i<chkObjs.length;i++){ <li>if(chkObjs[i].checked){ <li>if(chk == i){ <li>alert("The radio value has not changed and cannot be submitted"); <li>break; <li>} <li>} <li>} <li>} <li></script>



一;
two;
three;
four;
五;




Get the value of radio without making a choice
JPY
Euro< ;/p>

Native JS method: (Native DOM operations will treat text as a node, so there will be nextSibling)

var dollar = document.getElementsByName("money")[0].nextSibling.nodeValue;
var yen = document.getElementsByName("money")[1].nextSibling.nodeValue;
var euro= document.getElementsByName("money")[2].nextSibling.nodeValue;

jQuery method to get the radio value.

$('input[name="money"]:checked').next('span').html();
< input type="radio" name="money" value="1" checked="checked" />USD
Japanese yen
Euro< ;/p>

USD

The following are to be selected , only to determine whether there is a choice.

function radioValue(){
var radArr = document.getElementsByName("radiov");
var radValue = "";
//alert(radArr.length);
for(var i=0; i
//alert(radArr[i].checked+" "+radArr[i].name + " "+ radArr[i].value);
if(radArr[ i].checked){
radValue = radArr[i].value;
}
}
if(radValue != null && radValue != ""){
alert(radValue);
}else{
alert("Please select");
}
}