var Iterator = function(items,container) {
var container = container && document.getElementById(container) || document,items = container.getElementsByTagName(items),length = items.length,index = 0;
var splice = [].splice;
return {
f<a href="https://www.jb51.cc/tag/irs/" target="_blank" class="keywords">irs</a>t : function() {
index = 0;
return items[index];
},second : function() {
index = length - 1;
return items[index];
},pre : function() {
if (--index > 0) {
return items[index];
} else {
index = 0;
return null;
}
},next : function() {
if (++index < length) {
return items[index];
} else {
index = length - 1;
return null;
}
},get : function() {
index = num >= 0 ? num % length : num % length + length;
return items[index];
},dealEach : function(fn) {
var args = splice.call(arguments,1);
for (var i = 0; i < length; i++) {
fn.apply(items[i],args);
}
},dealItem : function(num,fn) {
fn.apply(this.get(num),splice.call(arguments,2));
},exclusive : function(num,allFn,numFn) {
this.dealEach(allFn);
if (Object.prototype.toString(items[num]) === "[object Array]") {
for (var i = 0,len = num.length; i < len; i++) {
this.dealItem(num[i],numFn);
}
} else {
this.dealItem(num,numFn);
}
}
}
}
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