//collapsibleByIcon 下拉按钮
namespace web.layout.behavior.collapsibleByIcon;

onMouseDown = function (ltTarget,ltOwner, x,y,mouseParams) { 
	// find first element with class "icon"
	var eleIcon = ltOwner.querySelector(".icon" /*css selector, sic!*/);  
	
	if( eleIcon != ltTarget)
 		return true; // event is not targeted to element having class "icon"
	
	// ok, we've got here targeted to icon. then get open/closed state. 
	var is_closed = ltOwner.getAttribute("state") == "close"; 
	
	// toggle value of attribute "state" and 
	// correspondent state flag - this is needed to play animation
	ltOwner.setAttribute("state",is_closed ? "open" : "close");
	
	// as it is ours then stop event bubbling
	return true; 
} 

onMouseDblClick = onMouseDown;