Jquery to load page automatically

Question

Hi there,

I have a view with an input field and a button when the button is clicked it triggers a jquery function to check where the value in the field is null or not if null I show a jquery alert saying the value cannot be nul

here is the script

 

$(document).ready(function(){

$('#btnAdd).on('click', function(){

if($('#Quantity).val()>0) 

{

....

}

else

{

alert('Quantity cannot be null')

}

})

 my problem is after the alert is displayed it goes straight to the index page instead of staying on the create one. I dunno why, could someone help me out please

 

Regard

 

Schleid