js 规格多选，选中展示和还可以选择的数量

js 规格多选，选中显示和还可以选择的数量
var list = new Array();
ogoodsSizeListTow.hammer().on('tap',function(e) {
//console.log(e);
var i;
myPub.OffMuiEvent(false);
var _tarTag = e.gesture.target;
    var target;
if(_tarTag.nodeName.toLowerCase() == 'li') {
target = $(_tarTag);
var  flowers = ogoodsSizeListTow.hasClass("Flowers");
if(flowers === true){
if(target.hasClass('active')){
target.removeClass('active');
i = list.length-1
oAddCarONBtn.text('还可以选择'+i+'件');
oAddCarONBtn.css('display','block')
oAddCarOKBtn.css('display','none');
$.each(list,function(i){
if(!list[i].hasClass('active')){
list.arrayRemove(i);
}
});
}
list.push(target);
target.addClass('active');
if(list.length > 3){
list.shift().removeClass('active');
}
i = 3 - list.length;
console.log(i)
oAddCarONBtn.text('还可以选择'+i+'件');
if(i == 0){
oAddCarONBtn.css('display','none')
oAddCarOKBtn.css('display','block');
}
return;
}
}
});

Array.prototype.arrayRemove = function(dx){
if(isNaN(dx)||dx>this.length){return false;}
this.splice(dx,1);
}