Disable the button partially
<p>I I'm using Raddatetimepicker to select began and enddate.
When user select two dates then he can click the button called fiter.
I want to show partially(it should appear when page load but in inactive mode) the button before user select the both end and began date. once he selected the both dates i should 
show the button as activated.
How can I do it.
Please help me.</p>
