Function to template DOM tags

tag.js

//create element
function tag(tag, attributes, childs){
    
    function isArray(o) {
        return Object.prototype.toString.call(o) === "[object Array]";
    }
    function isElement(o) {
        return !!(o && o.nodeType == 1);
    }
    function isTextNode(o) {
        return o.nodeType == 3;
    }
    function isObject(o){
        return typeof o==='object' && o!=null;
    }
    
    var element=document.createElement(tag);
    
    if(isObject(attributes)){
        for(var attName in attributes){
            var attValue=attributes[attName];
            if(attName.toLowerCase()=='style'){ element.style.cssText=attValue; }
            else if(attName.toLowerCase()=='class' || attName.toLowerCase()=='classname'){ element.className=attValue; }
            else{ element[attName] = attValue; }
        }
    }
    
    if(typeof childs=="string"){
        element.innerHTML = childs;
    }
    else{
        if(isArray(childs)){
            for(var i=0; i<childs.length; i++)
                if(isElement(childs[i]) || isTextNode(childs[i]))
                    element.appendChild(childs[i]);
                else if(typeof childs=="string")
                    element.appendChild(document.createTextNode(summary));
        }
        else{
            for(var i=2; i<arguments.length; i++)
                if(isElement(arguments[i]) || isTextNode(arguments[i]))
                    element.appendChild(arguments[i]);
                else if(typeof arguments[i]=="string")
                    element.appendChild(document.createTextNode(summary));
        }
    }
    
    return element;
}

/*
Examples

var myDiv = tag("div",{id:"d1", class:"c1"});
var myInput = tag("input", {type:"text", id:"name", placeholder:"Your Name here", maxlength:"20"});

var li = tag("li", {className: "recentpost"}, [
            tag("div", {className: "thumb"},
                tag("a", {href: link},
                    tag("img", {src: thumb})
                )
            ),
            tag("div",{className: "description"},
                tag("h1", {},
                    tag("a", {href: link}, title)
                ),
                document.createTextNode(summary)
            )
        ]);

*/