zhuzhuaicoding’s gists

zhuzhuaicoding / NaN-Infinity-trick

Created October 5, 2012 15:35

NaN,Infinity trick

zhuzhuaicoding / the Property of the RegExp function

Created October 10, 2012 04:00

$1,...属性是挂在正则表达式对象RegExp对象

	var myRe = /d(b+)d/g;
	var myArray = myRe.exec("cdbbdbsbz");

	console.log(RegExp.$1);//bb

zhuzhuaicoding / timeout diff with sleep func

Created October 14, 2012 02:25

sleep and settimeout diff

	function sleep(ms) {
	var dt = new Date();
	dt.setTime(dt.getTime() + ms);
	while (new Date().getTime() < dt.getTime());
	}

	// sleep(4000);
	console.log('setTimeout begin');
	setTimeout(

zhuzhuaicoding / scrollTop-Compatitable

Created October 17, 2012 09:04

scrollTop compatitable way

	function getScrollTop(){
	var position = [0, 0];
	if (typeof window.pageYOffset != 'undefined') {
	position = [
	window.pageXOffset, window.pageYOffset];
	} else if (typeof document.documentElement.scrollTop != 'undefined' && document.documentElement.scrollTop > 0) {
	position = [
	document.documentElement.scrollLeft, document.documentElement.scrollTop];
	} else if (typeof document.body.scrollTop != 'undefined') {
	position = [

zhuzhuaicoding / multiple-same-events-on-elem

Created October 19, 2012 11:17

bind mulitiple click events,can all exec.

	http://jsfiddle.net/UumUP/2913/

	// Function to change the content of t2
	function modifyText() {
	var t2 = document.getElementById("t2");
	t2.firstChild.nodeValue = "three";
	}

	// add event listener to t
	var el = document.getElementById("t");

zhuzhuaicoding / position-fixed.css

Created October 27, 2012 01:18 — forked from subtleGradient/position-fixed.css

Make position:fixed work in IE6

	/Make position:fixed work in IE6!/

	.fixed-top /* position fixed Top */{position:fixed;bottom:auto;top:0;}
	.fixed-bottom /* position fixed Bottom */{position:fixed;bottom:0;top:auto;}
	.fixed-left /* position fixed Left */{position:fixed;right:auto;left:0;}
	.fixed-right /* position fixed right */{position:fixed;right:0;left:auto;}

	* html,* html body /* IE6 Fixed Position Jitter Fix */{background-image:url(about:blank);background-attachment:fixed;}
	* html .fixed-top /* IE6 position fixed Top */{position:absolute;bottom:auto;top:expression(eval(document.documentElement.scrollTop));}
	* html .fixed-right /* IE6 position fixed right */{position:absolute;right:auto;left:expression(eval(document.documentElement.scrollLeft+document.documentElement.clientWidth-this.offsetWidth)-(parseInt(this.currentStyle.marginLeft,10)\|\|0)-(parseInt(this.currentStyle.marginRight,10)\|\|0));}

zhuzhuaicoding / PHP: Round to the Nearest 0.5 (1.0, 1.5, 2.0, 2.5, etc.)

Created October 27, 2012 02:14

PHP: Round to the Nearest

	The common practice of rounding, namely the round() function in PHP, is to round to the nearest decimal point, that is, 1.0, 2.0, 3.0, etc. or, 10, 20, 30, etc. For example,

	echo round(4.25, 0); // 4
	echo round(3.1415926, 2); // 3.14
	echo round(299792, -3); // 300000
	When I’m trying to aggregate all the customer ratings for a specific provider in one of my web hosting reviews community, I want to round the average rating to the nearest 0.5 (half the decimal) so that a half star would be correctly displayed.

	This is more of a mathematical problem than a PHP one. After some thinking and testing, I came up with a slightly more sophisticated solution than but the round() function:

	echo round(1.7 * 2) / 2; // 1.5

zhuzhuaicoding / getScrollXY

Created October 27, 2012 06:18

getScrollXY

	function getScrollXY() {
	var scrOfX = 0, scrOfY = 0;
	if( typeof( window.pageYOffset ) == 'number' ) {
	//Netscape compliant
	scrOfY = window.pageYOffset;
	scrOfX = window.pageXOffset;
	} else if( document.body && ( document.body.scrollLeft \|\| document.body.scrollTop ) ) {
	//DOM compliant
	scrOfY = document.body.scrollTop;
	scrOfX = document.body.scrollLeft;

zhuzhuaicoding / fixed style use javascirpt

Created October 27, 2012 06:19

fixed style use javascirpt

	/* It is not possible to get certain styles set in css such as display using
	the normal javascript. So we have to use this function taken from:
	http://www.quirksmode.org/dom/getstyles.html */
	function getStyle(el,styleProp)
	{
	var x = document.getElementById(el);
	if (x.currentStyle) // IE
	var y = x.currentStyle[styleProp];
	else if (window.getComputedStyle) // FF

zhuzhuaicoding / getStyle

Created October 27, 2012 06:20

getStyle compatibility

	/* It is not possible to get certain styles set in css such as display using
	the normal javascript. So we have to use this function taken from:
	http://www.quirksmode.org/dom/getstyles.html */
	function getStyle(el,styleProp)
	{
	var x = document.getElementById(el);
	if (x.currentStyle) // IE
	var y = x.currentStyle[styleProp];
	else if (window.getComputedStyle) // FF

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