javascript - Dropdown options can't access with jquery selector? -


i have drop down in webpage.it's aspx page.but try access drop down javascript.here code. code working.

var = document.getelementbyid('mydropdown'); alert(a.options.length);

this code not working

var = $('#mydropdown'); alert(a.options.length);

i getting following error.

typeerror: cannot read property 'length' of undefined

any 1 have idea.

$('#mydropdown') jquery object , treating dom object. try changing 

var = $('#mydropdown');

to 

var = $('#mydropdown')[0];

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