function supportRGBA() {
        var div = document.createElement( "div" ),
        div_style = div.style;
        div_style.cssText = "background-color:rgba(150,255,150,.5)";
        return (div_style.backgroundColor.indexOf( "rgba" ) > -1);
}
    
$(document).ready( function() {
    if(supportRGBA()){
        //remove default css
        $("#headermenu>ul>li").not("li.current_page_item").not("li.current_page_parent").css({borderBottomColor:'rgba(41,159,255,0)', borderBottomWidth:'2px', borderBottomStyle:'solid'});
        
        //When mouse hovers
        $("#headermenu>ul>li").not("li.current_page_item").not("li.current_page_parent").mouseover(function(){  
            $(this).stop().animate({borderBottomColor:'rgba(41, 159, 255, 255)'}, 300)
        });  

        //When mouse is removed
        $("#headermenu>ul>li").not("li.current_page_item").not("li.current_page_parent").mouseout(function(){  
            $(this).stop().animate({borderBottomColor:'rgba(41, 159, 255, 0)'}, 300)
        });
    }
});