Created
January 9, 2013 08:37
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(function () { | |
var el = document.createElement('div'), | |
b = document.getElementsByTagName('body')[0], | |
otherlib = false; | |
// Message window element | |
el.style.position = 'fixed'; | |
el.style.height = '32px'; | |
el.style.width = '220px'; | |
el.style.marginLeft = '-110px'; | |
el.style.top = '0'; | |
el.style.left = '50%'; | |
el.style.padding = '5px 10px'; | |
el.style.zIndex = 1001; | |
el.style.fontSize = '12px'; | |
el.style.color = '#222'; | |
el.style.backgroundColor = '#f99'; | |
// Determine if jQuery is loaded and/or if another function is already bound to $ | |
if (typeof jQuery != 'undefined') | |
return showMsg('This page already using jQuery v' + jQuery.fn.jquery); | |
else if (typeof $ == 'function') | |
otherlib = true; | |
// Script loader - more or less stolen form jquery core and adapted by paul irish | |
function loadScript(url, success) { | |
var script = document.createElement('script'); | |
script.src = url; | |
var head = document.getElementsByTagName('head')[0], | |
done = false; | |
// Attach handlers for all browsers | |
script.onload = script.onreadystatechange = function () { | |
if (!done && (!this.readyState | |
|| this.readyState == 'loaded' | |
|| this.readyState == 'complete')) { | |
done = true; | |
success(); | |
script.onload = script.onreadystatechange = null; | |
head.removeChild(script); | |
} | |
}; | |
head.appendChild(script); | |
} | |
// Load jQuery | |
loadScript('http://code.jquery.com/jquery-latest.min.js', function () { | |
if (typeof jQuery == 'undefined') | |
showMsg('Sorry, but jQuery wasn\'t able to load'); | |
else | |
showMsg('This page is now jQuerified with v' + jQuery.fn.jquery + (otherlib ? ' and noConflict(). Use $jq(), not $().' : '')); | |
}); | |
// Show status message | |
function showMsg(msg) { | |
el.innerHTML = msg; | |
b.appendChild(el); | |
window.setTimeout(function () { | |
if (typeof jQuery == 'undefined') { | |
b.removeChild(el); | |
} else { | |
jQuery(el).fadeOut('slow', function () { | |
jQuery(this).remove(); | |
}); | |
if (otherlib) | |
$jq = jQuery.noConflict(); | |
} | |
}, 2500); | |
} | |
})(); |
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