i need a tampermonkey select a specify size command - html

Question

Can I have the tampermonkey with jquery command for select a specify size? I have this situation:
<select name="group_1" id="group_1" class="attribute_select" onchange="findCombination();getProductAttribute();$('#wrapResetImages').show('slow');;">
<option title="44" value="19">44</option>
<option title="45" value="21">45</option>
<option title="46" value="23">46</option>
</select>
]
I used this command but it select size but doesn't work finally:
var size = "46";
var sliceright = size.length;
function setSelectedIndex (s, v) {
for ( var i = 0; i < s.options.length; i++ ) {
if ( s.options[i].text.slice(0,sliceright) == v ) {
s.options[i].selected = true;
return;
}
}
}
setSelectedIndex (document.getElementById('group_1'),size);

Answer 1

I'm not sure that I understand correctly your question, but If you want a JQuery selector to select a <option> by text instead of by value attribute you can try with:
var text = '46';
// select the element by id which has an <option> an contains
// the desired text. Then set the selected attribute
$('#group_1 option:contains("' + text + '")').attr('selected', 'selected');
<script src="https://ajax.googleapis.com/ajax/libs/jquery/1.11.1/jquery.min.js"></script>
<select name="group_1" id="group_1" class="attribute_select">
<option title="44" value="19">44</option>
<option title="45" value="21">45</option>
<option title="46" value="23">46</option>
</select>
UPDATE:
After check out your example seems that in your web it's necessary to invoke click event after select an <option>. Also since all the <select> has a different id attribute but the same class, maybe it's more convenient use this as selector instead of the id. In short you can try with:
var text = '46';
$('.attribute_select option:contains("' + text + '")').attr('selected', 'selected').click();