to validate checkbox input for table using multiple rows

i using js to add multiple row 开发者_如何转开发in a particular table, but when submit the form all check box having the same value, so how can i validate this checkbox using js before submit so change value to if unchecked, i trying on that but got no solution, does any one this before,

thanks in advance

What are your checkboxes called? Do they all have the same name? You have two options. One is giving each checkbox an unique name, the other is giving your checkbox a name like checkboxes[]. The [] lets all the values be entered into an array so they don't overwrite eachother.

If you mean something else, you have to state more clear what you want, because it's a bit incomprehensible right now.

finally i found solution for my problem, thanks 'vindia' for the clue, i add checkbox with array, sol as below

in html

 `<input id="abc[]" name="abc[]" type="checkbox" value="1">`

in js

for(var i=0;i<chkDefaultLength;i++){  
   if(!document.neworupdateevent["chkDefault[]"][i].checked){  
        document.neworupdateevent["chkDefault[]"][i].value=0;  
    }           
   }