checkbox check is checked

by slawe

HTML

<input type="checkbox" class="gallery-checkbox" value="1">
<input type="checkbox" class="gallery-checkbox" value="2">

JavaScript

var x = document.getElementsByClassName('gallery-checkbox');
for(var i=0; x[i]; ++i){
    if (x[i].value === '1') {
        x[i].checked = true;
    }
}