Question

109

Looping through a checkbox array that has one element

rated 0 times [ 113] [ 4] / answers: 1 / hits: 17167 / 12 Years ago, thu, november 8, 2012, 12:00:00

I have a list of dynamically created checkboxes named tags which I loop through with javascript to make sure only 1 is checked and to get the value. If for some reason this list of checkboxes only has 1 item, my script won't look at it. When I alert the tag's length I get undefined.

    var total=[];

    for (var i=0; i < document.form1.tags.length; i++){

        if(document.form1.tags[i].checked==true){

            total.push(document.form1.tags[i].value);

        }

    }



    if(total.length==0){

        alert(Please select a product to edit.);

    }else if (total.length>1){

        alert(Please select only one product to edit.);

    }else{

        document.location = go somewhere;

    }

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taylert

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answered 12 Years ago mercedez · Accepted Answer

Two suggestions:

use getElementsByName instead to get all the elements so you can iterate them:

Use a framework like jquery. Any reason you can't use jquery or another framework? Your life would be so much easier.

var tags = document.getElementsByName('tags');

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

{

    if(tags[i].checked) .....

}