How to check if a value exist in selectbox using js....

Question

Hello all,

Is there any method other than running a for loop to check if a value exists in select box using js???? Im looking for something like document.getElementById('selbox').valueExists('myval');

Answer 1

you can do it with jquery

Use the Attribute Equals Selector

see in

http://stackoverflow.com/questions/2248976/check-if-value-is-in-select-list-with-jquery#answer-2248991

in javascript you can run like

 for (var i=0; i<document.getElementById('mySelect').options.length; i++)
           { 
            if (document.getElementById('mySelect').options[i].text == seachtext) 
            { 
             alert('found');
             break;
            } 
       }

Answer 2

You can't extend the methods the select-element has. So there will not be a solution without an extra function to check for the existence of a value in a select.

A "solution" without a loop could be the following...

function SelectHasValue(select, value) {
    obj = document.getElementById(select);

    if (obj !== null) {
        return (obj.innerHTML.indexOf('value="' + value + '"') > -1);
    } else {
        return false;
    }
}