Implementing smart right-click menu based on JavaScript_javascript skills

var cityArray = new Array(); 
cityArray.push("北京"); 
cityArray.push("上海"); 
//设置表头的鼠标右击事件 
$('th').mousedown(function(e){ 
var selected = e.target.innerHTML; 
//3表示右键 
if(e.which==3){ 
if(selected=="订票类型"){ 
var opertion ={ 
name : "订票类型" 
}; 
var data = [[{ 
text:'出票', 
func:function(){ 
alert("出票"); 
} 
}],[{ 
text:'留票', 
func:function(){ 
alert("留票"); 
} 
}],[{ 
text:'改签', 
func:function(){ 
alert("改签"); 
} 
}],[{ 
text:'退票', 
func:function(){ 
alert("退票"); 
} 
}],[{ 
text:'全部', 
func:function(){ 
alert("全部"); 
} 
}]]; 
$(this).smartMenu(data,opertion); 
}else if(selected=="出发城市"){ 
var opertion ={ 
name : "出发城市" 
}; 
var data = []; 
for(var i=0;i<cityArray.length;i++){ 
//使用闭包 
(function(i){ 
func = function(){ 
alert(cityArray[i]); 
} 
})(i); 
var obj = { 
text:cityArray[i], 
func:func 
}; 
var cArray = new Array(); 
cArray.push(obj); 
data.push(cArray); 
} 
var other = { 
text:"全部", 
func:function(){ 
alert("全部"); 
} 
} 
var otherArray = new Array(); 
otherArray.push(other); 
data.push(otherArray); 
$(this).smartMenu(data,opertion); 
} 
} 
return false;//阻止链接跳转 
});