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/** Universal function for unobtrusive adding event handler to element.
 *  It doesn't replace yet binded handler, for example in the tag.
 *  It returns value of the new handler, so values of previous handlers
 *  will be replaced.
 *	
 *  Arguments:
 *      element: target HTML element of binding,
 *      event: string with name of the event, for example, 'onclick',
 *      newHandler: function to be binded.
**/

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javascript:var b="Browser Overview: \n";for(var p in navigator){b+=p+": "+navigator[p]+"\n"};alert(b);

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if (!window.Node) {
    var Node = {
        ELEMENT_NODE: 1,
        ATTRIBUTE_NODE: 2,
        TEXT_NODE: 3,
        COMMENT_NODE: 8,
        DOCUMENT_NODE: 9,
        DOCUMENT_FRAGMENT_NODE: 11
    }
}

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(function(){
    if (window.addEventListener) window.addEventListener("load", init, false);
    else if (window.attachEvent) window.attachEvent("onload", init);
    function init(){}
})();

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function parseURL(url){
	var l = document.createElement("a");
	l.href = url;
    // output object
	var o = {
		// parts of parsed URL
		hash: l.hash,
		host: l.host,
		hostname: l.hostname,
		href:l.href,

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function factorial(n) {
        return n === 0 ? 1 : n <= 2 ? n : n * factorial(n - 1);
};