Lets try this one
Step 1
/*********************************************** * Limit number of checked checkboxes script- by JavaScript Kit (www.javascriptkit.com) * This notice must stay intact for usage * Visit JavaScript Kit at http://www.javascriptkit.com/ for this script and 100s more *********************************************/
function checkboxlimit(checkgroup, limit){ var checkgroup=checkgroup var limit=limit 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 if (checkedcount>limit){ alert("You can only select a maximum of "+limit+" checkboxes") this.checked=false } } } }
Step 2
id="world" name="world" type="checkbox" name="countries" / USA<br /> type="checkbox" name="countries" / Canada<br /> type="checkbox" name="countries" / Japan<br /> type="checkbox" name="countries" / China<br /> type="checkbox" name="countries" / France<br /> /form
//Syntax: checkboxlimit(checkbox_reference, limit) checkboxlimit(document.forms.world.countries, 2)
