I need a radio button empty validation,My radio button is in array .
for example: <input type="radio" name="material[]" >
for example: <input type="radio" name="material[]" >
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Use document.getEle mentsByName("ma terial[]") to get the list of radio buttons. Loop over them checking the checked property of each and if none are checked, the validation would fail. -
This is the thing I think you wanted and Acoder has suggested.
[HTML]<html><body >
<td><input type="button" id ="floatButt" value="Click Me.." onclick="checkR adio();"/></td>
<td><input type="radio" id ="attachment 1" name="radio"/></td>
<td><input type="radio" id ="attachment 2" name="radio"/></td>
</body></html>[/HTML]
This problem could arise..........Code:<script type='text/javascript'> function checkRadio(){ var radios=document.getElementsByName("radio"); var radioLength=radios.length; for (i=0;i<radioLength;i++){var rad=radios[i]; if(rad.checked==true){alert(rad.id);} } </script>
If suppose I want ids of all the radio in my page which is selected.It may be possible that there is more than 1 set of radios in my page one for gender another for marital status.And because of some other reason I have to keep the name not same.
Also If you want to write external js file which should work for any document
Then this is the solution....... ..
Code:var alltags=document.getElementsByTagName("*"); var tagLength=alltags.length; for (i=0;i<tagLength;i++) { if(alltags[i].type=='radio') { if(alltags[i].checked==true){alert(alltags[i].id);} } }Comment
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