function x_over($NavName){
	var obj=document.getElementById($NavName);
	obj.className="nav";
	//obj.className+=(obj.className.length>0? " ": "") + "sfhover";
}

function x_out($NavName){
	var obj=document.getElementById($NavName);
	obj.className="display1";
}
function doMenu($MenuID) 
{ 
 	var CurMenu = document.all($MenuID); 
	　 if (IsDroped==true) 
		 { 
			 window.event.cancelBubble = true; 
				 return false; 
		} 
			 window.event.cancelBubble = true; 
		　   TempMenu = CurMenu; 
		 x = window.event.srcElement.offsetLeft + window.event.srcElement.offsetParent.offsetLeft; 
		 x2 = x + window.event.srcElement.offsetWidth; 
		 y = pad.offsetHeight; 
			 CurMenu.style.top = y; 
			 CurMenu.style.left = x; 
			 CurMenu.style.clip = "rect(0 0 0 0)"; 
			 CurMenu.style.display = "block"; 
			 window.setTimeout("showMenu()", 2);	 
			 return true; 
} 
function showMenu() 
　　{ 
 		y2 = y + TempMenu.offsetHeight; 
		 TempMenu.style.clip = "rect(auto auto auto auto)"; 
		IsDroped =true;//下拉菜单已经显示 
	} 
function hideMenu() 
{ 
	cY = event.clientY + document.body.scrollTop; 
		if (cY>=y && cY<y2 && event.clientX >= (x+5) && event.clientX <= x2 || 
			 cY>1 && cY<y && event.clientX >= (x+5) && event.clientX <= x2-10) 
				{ window.event.cancelBubble = true; return;} 
				　 TempMenu.style.display = "none"; 
				　 　 window.event.cancelBubble = true; 
						 IsDroped =false; 
}