.dropdown_panel{    
    border:1px solid #000000;    
    margin:0 auto;  
    height:400px;
    z-index:1000;
    position:absolute;  
    left:-999em; /* Hides the drop down */  
    text-align:left;  
    padding:10px 5px 30px 5px;  
    top:auto;
    border-top:none; 
    background: #000000;      
    background: -moz-linear-gradient(top, #000000, #3c3c3c);  /* FF 3+ */
    background: -webkit-gradient(linear, 0% 0%, 0% 100%, from(#000000), to(#3c3c3c)); /*Safari + Chrome */
    background: -ms-linear-gradient(top, #000000, #3c3c3c);  /* IE 10 */
    background: -o-linear-gradient(top, #000000, #3c3c3c);   /* Opera 11 */    
    
    
    -moz-border-radius: 0px 0px 7px 7px;  
    -webkit-border-radius: 0px 0px 7px 7px;  
    border-radius: 0px 0px 7px 7px;      
    width:700px;  
    line-height:12px;    
    color:#fff;
    
    -webkit-transition:max-height 0.3s linear;
    -moz-transition:max-height 0.3s linear;
    transition:max-height 0.3s linear;  
    max-height:0px;    
    overflow:hidden;
}