$(document).ready(function(){
	$(".left_menu_btn").mouseenter(function() {
	    if($(this).children('#submenu_block_hide')) {
			$(this).children('#submenu_block_hide').slideDown(0);//.attr("id", "submenu_block");
		}
	});
	$(".left_menu_btn").mouseleave(function() {
	    if($(this).children('#submenu_block_hide')) {
			$(this).children('#submenu_block_hide').hide(0);//.attr("id", "submenu_block_hide");
		}
	});
});