Validation for Asp FileUpload Control using JavaScript
function validatefileuploadcontrol() { $( $( 'input[id*="FileUpload1"]' )).change( function () { var fileExtension = [ 'doc' , 'docx' ]; //Extensions if ($.inArray($( this ).val().split( '.' ).pop().toLowerCase(), fileExtension) == - 1 ) { alert( "'.doc', '.docx' formats are allowed." ); } }) }