我的i传不进函数

Question

var flag=[0,0,0,0,0,0,0,0,0,0,0,0,0,0];

var span=document.getElementsByName("span");

for(var i=0;i<14;i++){

$("#span"+i).bind("click",function(){

alert(i);

if(flag[i]==0){

$("#ul_display"+i).css({"display":"block"});

flag[i]=1;

}

else{

$("#ul_display"+i).css({"display":"none"});

flag[i]=0;

}

});

}