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dom.mixin = function(result, source) {
if (arguments.length === 1) {
source = result;
result = dom;
}
if (result && source ){
for(var key in source)
source.hasOwnProperty(key) && (result[key] = source[key]);
}
if(arguments.length > 2 ){
var others = [].slice.call(arguments,2);
for(var i=0,n=others.length;i<n;i++){
result = arguments.callee(result,others[i]);
}
}
return result;
}

dom.mixin = function(result, source) {
if (arguments.length === 1) {
source = result;
result = dom;
}
if (result && source ){
for(var key in source)
source.hasOwnProperty(key) && (result[key] = source[key]);
}
if(arguments.length > 2 ){
var others = [].slice.call(arguments,2);
for(var i=0,n=others.length;i<n;i++){
result = arguments.callee(result,others[i]);
}
}
return result;
}
var fn = "prototype",
toString = Object[fn].toString;
dom.mixin({
//ÀàÐÍʶ±ð
is : function (obj,type) {
var undefined;
return (type === "Null" && obj === null) ||
(type === "Undefined" && obj === undefined ) ||
toString.call(obj).slice(8,-1) === type;


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