Hai folks

slide down works charm. but slide up does not.

Code:
$('#bt1').click(function () {
   if(document.getElementById("drop_down_button1").style.display=="none"){  
      $('#drop_down_button1').slideDown('slow');
   }else{
       //document.getElementById("drop_down_button1").style.display="none"; 
       //// if i uncomment above line and comment blow one. then it works. 
       $('#drop_down_button1').slideUp('slow');
	   
   }	  
});