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toggle checkbox group when the max limit is reached

 
Greenhorn
Posts: 3
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hi
Suppose i have 10 checkboxes and i allow the user to check max of 4 checkboxes.
When the limit is reached i.e. 4, i need to disable all the other checkboxes
and when i uncheck anyone (now only 3 are checked) all the checkboxes should be enabled

Here's the code which i tried
<html>

<head>
<meta http-equiv="Content-Type" content="text/html; charset=ISO-8859-1">


<script type="text/javascript">

function checkboxlimit(checkgroup,max,min){
var checkgroup=checkgroup
var onlycheckgroup;


for (var i=0; i<checkgroup.length; i++){

checkgroup[i].onclick=function(){
var checkedcount=0

for (var i=0; i><checkgroup.length; i++){
checkedcount+=(checkgroup[i].checked)? 1 : 0
alert("checkedcount is "+checkedcount)


if (checkedcount==max){
var a=checkgroup[i].checked;
alert("only checked "+a);
if(a==true){
onlycheckgroup=document.getElementsByName('selectedItems');
alert("onlycheckgroup "+onlycheckgroup);


alert("in for loop");

alert(1);
onlycheckgroup[i].disabled=true;


}
else{
alert(2);
onlycheckgroup[i].disabled=false;
}


}
}
}
}

}


></script>


</head>

<body>


<input type="checkbox" name="selectedItems" id="check" onclick="checkboxlimit(selectedItems,2)";/> <c:out value="John"/> <input type="checkbox" name="selectedItems" id="check" onclick="checkboxlimit(selectedItems,2)";/> <c:out value="Smith"/> <input type="checkbox" name="selectedItems" id="check" onclick="checkboxlimit(selectedItems,2)";/> <c:out value="Peter"/> <input type="checkbox" name="selectedItems" id="check" onclick="checkboxlimit(selectedItems,2)";/> <c:out value="Angel"/>




</form>
</body>

</html>


please help
 
Sheriff
Posts: 9683
42
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Hi Madhvi welcome to javaranch

please Use Code Tags when you post a source code. You can edit your message using button and then add code tags to it and also indent the code properly. Also what happens when you run this code??
 
Sheriff
Posts: 67558
173
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Without the code tags, it's unlikely most people will bother to try and read your post.
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