javascript - JS: looping function through checkbox array not counting properly -

i want validate input on series of checkboxes. there must @ least 1 checkbox selected, otherwise user gets alert select one. however, alert appears unless of checkboxes selected.

i realize issue how loop params set, cannot figure out how fix it.

for(var i=0;i<7;i++){     if( !checkboxes[i].checked ){         alert( 'you need select @ least 1 day!');         checkboxes[i].focus();         return false;     } } 

you can use flag set validation status , set true if atleast 1 item checked.

then after loop check whether flag set else there no checkboxes selected.

var valid = false; (var = 0; < checkboxes.length; i++) {     if (checkboxes[i].checked) {         valid = true;         break;     } }  if (!valid) {     alert('you need select @ least 1 day!');     checkboxes[0].focus();     return false; }