How to get values from checkbox

Question

here is my code. I can't make the alert works.

var chooseObject = document.getElementsByTagName("input");
var objectLength = chooseObject.length;
var hobbyArray = [];
    //hobbyArray("aaa");
    //hobbyArray("bbb");
    //alert(hobbyArray); This one works.
for(var i=0;i<=objectLength;i++){
    if((chooseObject[i].type=="checkbox")&&(chooseObject[i].checked==true)){
         //alert(chooseObject[i].value); This one works.
         hobbyArray.push(chooseObject[i].value); }
}
alert(hobbyArray);

If I do the top alert(I comment already) it works. If I alert chooseObject[i].value in the for loop, its fine. But if I do with array, it failed. Could someone help me?

alerting an array is not exactly the way to go.. But most browser should give you some kind of content in your alert. Try alert(hobbyArray.join(', ')); — Koen.
– Koen., Commented Nov 12, 2012 at 21:34

bfavaretto · Accepted Answer · 2012-11-12 21:34:31Z

2

You have a silly error on your for statement. This:

for(var i=0;i<=objectLength;i++)

should be:

for(var i=0;i<objectLength;i++)

The extra iteration is causing a TypeError when you check the element's properties (chooseObject[objectLength] gives undefined, which has no properties).

answered Nov 12, 2012 at 21:34

bfavaretto

72k18 gold badges118 silver badges162 bronze badges

Sign up to request clarification or add additional context in comments.

Collectives™ on Stack Overflow

How to get values from checkbox

1 Answer 1

Comments

Your Answer

Hot Network Questions

Collectives™ on Stack Overflow

1 Answer 1

Comments

Your Answer

Sign up or log in

Post as a guest

Related