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onSubmit check the checkbox value

Posted on 2013-01-28
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Last Modified: 2013-01-30
I am new to javascript, how to write on submit, check that Src and Dst are never checked at the same time; otherwise alert.

<FORM METHOD=POST>

       <INPUT TYPE=\"checkbox\" NAME=\"top\" value=\"Eve\" $eventIdChk >Evening<br>
       <INPUT TYPE=\"checkbox\" NAME=\"top\" value=\"Src\" $srcIpChk >Source<br>
       <INPUT TYPE=\"checkbox\" NAME=\"top\" value=\"Dst\" $dstIpChk >Destination<br>

<INPUT TYPE=\"submit\" NAME=\"SetIt\" VALUE=\"SetIt\">

</FORM>
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Question by:rgbcof
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3 Comments
 
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leakim971 earned 2000 total points
ID: 38829456
Test page : http://jsfiddle.net/efpTm/1/
<script type="text/javascript">
window.onload = function() {

document.getElementsByTagName("form")[0].onsubmit = function() {
     var Src_Is_Checked = document.getElementsByName("top")[1].checked;
     var Dst_Is_Checked = document.getElementsByName("top")[2].checked;
     if( Src_Is_Checked && Dst_Is_Checked ) {
          alert("please check source OR destination");
          return false;
     }
     return true;
}

}
</script>
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LVL 82

Assisted Solution

by:leakim971
leakim971 earned 2000 total points
ID: 38829459
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Author Closing Comment

by:rgbcof
ID: 38838314
Works great.
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