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Sunday, January 05, 2014

Checking for Browser Support for Web Workers

How to Check for Browser Support for Web Workers
=======================================
use listed below code:


<!DOCTYPE HTML>
<html>
<head>
<title>Checking for Browser Support for Web Workers</title>
  <script src="modernizr-1.5.min.js"></script>
</head>
<body>
   <p>Checking for Browser Support for Web Workers</p>
   <input type="button" onClick="dochk();" value="Check Web Worker"/>
</body>

<script>
function dochk() {
    if (Modernizr.webworkers) {
        alert("Congratulation!! you have web workers support." );
    } else {
        alert("Sorry!! you do not have web workers support." );
    }   
}
</script>
</html>

and this is the "modernizr-1.5.min.js" file
================================
 window.Modernizr=function(i,
e,I){function C(a,b){for(var c in a)if(m[a[c]]!==I&&(!b||b(a[c],D)))return true}function r(a,b){var c=a.charAt(0).toUpperCase()+a.substr(1);return!!C([a,"Webkit"+c,"Moz"+c,"O"+c,"ms"+c,"Khtml"+c],b)}function P(){j[E]=function(a){for(var b=0,c=a.length;b<c;b++)J[a[b]]=!!(a[b]in n);return J}("autocomplete autofocus list placeholder max min multiple pattern required step".split(" "));j[Q]=function(a){for(var b=0,c,h=a.length;b<h;b++){n.setAttribute("type",a[b]);if(c=n.type!==
 "text"){n.value=K;/tel|search/.test(n.type)||(c=/url|email/.test(n.type)?n.checkValidity&&n.checkValidity()===false:n.value!=K)}L[a[b]]=!!c}return L}("search tel url email datetime date month week time datetime-local number range color".split(" "))}var j={},s=e.documentElement,D=e.createElement("modernizr"),m=D.style,n=e.createElement("input"),E="input",Q=E+"types",K=":)",M=Object.prototype.toString,y=" -o- -moz- -ms- -webkit- -khtml- ".split(" "),d={},L={},J={},N=[],u=function(){var a={select:"input",
 change:"input",submit:"form",reset:"form",error:"img",load:"img",abort:"img"},b={};return function(c,h){var t=arguments.length==1;if(t&&b[c])return b[c];h=h||document.createElement(a[c]||"div");c="on"+c;var g=c in h;if(!g&&h.setAttribute){h.setAttribute(c,"return;");g=typeof h[c]=="function"}h=null;return t?(b[c]=g):g}}(),F={}.hasOwnProperty,O;O=typeof F!=="undefined"&&typeof F.call!=="undefined"?function(a,b){return F.call(a,b)}:function(a,b){return b in a&&typeof a.constructor.prototype[b]==="undefined"};
 d.canvas=function(){return!!e.createElement("canvas").getContext};d.canvastext=function(){return!!(d.canvas()&&typeof e.createElement("canvas").getContext("2d").fillText=="function")};d.geolocation=function(){return!!navigator.geolocation};d.crosswindowmessaging=function(){return!!i.postMessage};d.websqldatabase=function(){var a=!!i.openDatabase;if(a)try{a=!!openDatabase("testdb","1.0","html5 test db",2E5)}catch(b){a=false}return a};d.indexedDB=function(){return!!i.indexedDB};d.hashchange=function(){return u("hashchange",
 i)&&(document.documentMode===I||document.documentMode>7)};d.historymanagement=function(){return!!(i.history&&history.pushState)};d.draganddrop=function(){return u("drag")&&u("dragstart")&&u("dragenter")&&u("dragover")&&u("dragleave")&&u("dragend")&&u("drop")};d.websockets=function(){return"WebSocket"in i};d.rgba=function(){m.cssText="background-color:rgba(150,255,150,.5)";return(""+m.backgroundColor).indexOf("rgba")!==-1};d.hsla=function(){m.cssText="background-color:hsla(120,40%,100%,.5)";return(""+
 m.backgroundColor).indexOf("rgba")!==-1};d.multiplebgs=function(){m.cssText="background:url(//:),url(//:),red url(//:)";return/(url\s*\(.*?){3}/.test(m.background)};d.backgroundsize=function(){return r("backgroundSize")};d.borderimage=function(){return r("borderImage")};d.borderradius=function(){return r("borderRadius","",function(a){return(""+a).indexOf("orderRadius")!==-1})};d.boxshadow=function(){return r("boxShadow")};d.opacity=function(){var a=y.join("opacity:.5;")+"";m.cssText=a;return(""+m.opacity).indexOf("0.5")!==
 -1};d.cssanimations=function(){return r("animationName")};d.csscolumns=function(){return r("columnCount")};d.cssgradients=function(){var a=("background-image:"+y.join("gradient(linear,left top,right bottom,from(#9f9),to(white));background-image:")+y.join("linear-gradient(left top,#9f9, white);background-image:")).slice(0,-17);m.cssText=a;return(""+m.backgroundImage).indexOf("gradient")!==-1};d.cssreflections=function(){return r("boxReflect")};d.csstransforms=function(){return!!C(["transformProperty",
 "WebkitTransform","MozTransform","OTransform","msTransform"])};d.csstransforms3d=function(){var a=!!C(["perspectiveProperty","WebkitPerspective","MozPerspective","OPerspective","msPerspective"]);if(a){var b=document.createElement("style"),c=e.createElement("div");b.textContent="@media ("+y.join("transform-3d),(")+"modernizr){#modernizr{height:3px}}";e.getElementsByTagName("head")[0].appendChild(b);c.id="modernizr";s.appendChild(c);a=c.offsetHeight===3;b.parentNode.removeChild(b);c.parentNode.removeChild(c)}return a};
 d.csstransitions=function(){return r("transitionProperty")};d.fontface=function(){var a;if(/*@cc_on@if(@_jscript_version>=5)!@end@*/0)a=true;else{var b=e.createElement("style"),c=e.createElement("span"),h,t=false,g=e.body,o,w;b.textContent="@font-face{font-family:testfont;src:url('data:font/ttf;base64,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')}";
 e.getElementsByTagName("head")[0].appendChild(b);c.setAttribute("style","font:99px _,arial,helvetica;position:absolute;visibility:hidden");if(!g){g=s.appendChild(e.createElement("fontface"));t=true}c.innerHTML="........";c.id="fonttest";g.appendChild(c);h=c.offsetWidth*c.offsetHeight;c.style.font="99px testfont,_,arial,helvetica";a=h!==c.offsetWidth*c.offsetHeight;var v=function(){if(g.parentNode){a=j.fontface=h!==c.offsetWidth*c.offsetHeight;s.className=s.className.replace(/(no-)?fontface\b/,"")+
 (a?" ":" no-")+"fontface"}};setTimeout(v,75);setTimeout(v,150);addEventListener("load",function(){v();(w=true)&&o&&o(a);setTimeout(function(){t||(g=c);g.parentNode.removeChild(g);b.parentNode.removeChild(b)},50)},false)}j._fontfaceready=function(p){w||a?p(a):(o=p)};return a||h!==c.offsetWidth};d.video=function(){var a=e.createElement("video"),b=!!a.canPlayType;if(b){b=new Boolean(b);b.ogg=a.canPlayType('video/ogg; codecs="theora"');b.h264=a.canPlayType('video/mp4; codecs="avc1.42E01E"');b.webm=a.canPlayType('video/webm; codecs="vp8, vorbis"')}return b};
 d.audio=function(){var a=e.createElement("audio"),b=!!a.canPlayType;if(b){b=new Boolean(b);b.ogg=a.canPlayType('audio/ogg; codecs="vorbis"');b.mp3=a.canPlayType("audio/mpeg;");b.wav=a.canPlayType('audio/wav; codecs="1"');b.m4a=a.canPlayType("audio/x-m4a;")||a.canPlayType("audio/aac;")}return b};d.localStorage=function(){return"localStorage"in i&&i.localStorage!==null};d.sessionStorage=function(){try{return"sessionStorage"in i&&i.sessionStorage!==null}catch(a){return false}};d.webworkers=function(){return!!i.Worker};
 d.applicationCache=function(){var a=i.applicationCache;return!!(a&&typeof a.status!="undefined"&&typeof a.update=="function"&&typeof a.swapCache=="function")};d.svg=function(){return!!e.createElementNS&&!!e.createElementNS("http://www.w3.org/2000/svg","svg").createSVGRect};d.smil=function(){return!!e.createElementNS&&/SVG/.test(M.call(e.createElementNS("http://www.w3.org/2000/svg","animate")))};d.svgclippaths=function(){return!!e.createElementNS&&/SVG/.test(M.call(e.createElementNS("http://www.w3.org/2000/svg",
 "clipPath")))};for(var z in d)if(O(d,z))N.push(((j[z.toLowerCase()]=d[z]())?"":"no-")+z.toLowerCase());j[E]||P();j.addTest=function(a,b){a=a.toLowerCase();if(!j[a]){b=!!b();s.className+=" "+(b?"":"no-")+a;j[a]=b;return j}};m.cssText="";D=n=null;(function(){var a=e.createElement("div");a.innerHTML="<elem></elem>";return a.childNodes.length!==1})()&&function(a,b){function c(f,k){if(o[f])o[f].styleSheet.cssText+=k;else{var l=t[G],q=b[A]("style");q.media=f;l.insertBefore(q,l[G]);o[f]=q;c(f,k)}}function h(f,
 k){for(var l=new RegExp("\\b("+w+")\\b(?!.*[;}])","gi"),q=function(B){return".iepp_"+B},x=-1;++x<f.length;){k=f[x].media||k;h(f[x].imports,k);c(k,f[x].cssText.replace(l,q))}}for(var t=b.documentElement,g=b.createDocumentFragment(),o={},w="abbr|article|aside|audio|canvas|command|datalist|details|figure|figcaption|footer|header|hgroup|keygen|mark|meter|nav|output|progress|section|source|summary|time|video",v=w.split("|"),p=[],H=-1,G="firstChild",A="createElement";++H<v.length;){b[A](v[H]);g[A](v[H])}g=
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 function(){for(var f=-1,k;++f<p.length;)p[f][1].parentNode.replaceChild(p[f][0],p[f][1]);for(k in o)t[G].removeChild(o[k]);o={};p=[]})}(this,e);j._enableHTML5=true;j._version="1.5";s.className=s.className.replace(/\bno-js\b/,"")+" js";s.className+=" "+N.join(" ");return j}(this,this.document);


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Difference between primary key and unique key in sql

Difference between primary key and unique key in sql.
======================================================
Primary key                            Unique key
1-can not be null                    1-can be null and multiple null
2-can not be same value        2-can not be same value
3-only be one column name  3-multiple column could be unique
suppose emp_id is primary key and city is the unique key
primary key                                   unique key
-----------------------------------------------------------------------------------
emp_id        emp_nm        sal        city
-----------------------------------------------------------------------------------
0                  AA            18000        (null)      
1                 BB             18000        NEW DELHI
3                CC             18000        NOIDA
2                DD             18000        (null)
4                EE             18000        KANPUR
5                FF             18000        (null)
6                GG             18000        (null)
----------------------------------------------------------------------------------




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Multiple attribute passing in querySelectorAll

Multiple attribute passing in querySelectorAll     Here I am demonstrating code to how to pass multiple attributes in querySelectorAll. <...

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