JS How to get the value of the radio after it is selected and the value of the radio when it is not selected_javascript skills

The following is an article taken from the Internet (not tested but very standard and can be imitated)

Copy the code The code is as follows:

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

一;
two;
three;
four;
five;

The following is to get the value of radio without making a selection

Copy code The code is as follows:

USD
JPY
EUR

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

Copy Code The code is as follows:

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

jQuery way

Copy code The code is as follows:

$('input[name="money"]:checked') .next('span').html();

USD< ;/span>
yen
Euro


USD

The following are to be selected:

This only determines whether there is a selection

Copy code The code is as follows:

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");
}

}