Javascript Codes

doc_append.js

function doc_append ( obj ){
	if( document.getElementsByTagName("head").length > 0 ){
		document.getElementsByTagName("head")[0].appendChild( obj );
	}
	else{
		document.getElementsByTagName("body")[0].appendChild( obj );
	}
}

var url_css = 'http://example.com/css/file.css';
var o_css = document.createElement("link");
o_css.setAttribute("rel", "stylesheet");
o_css.setAttribute("type", "text/css");
o_css.setAttribute("href", url_css + '?r=' + (Math.random()*99999999) );
doc_append( o_css );

var url_js = 'http://example.com/js/file.js';
var o_js = document.createElement("script");
o_js.setAttribute("src", url_js + '?r=' + (Math.random()*99999999) );
doc_append( o_js );

gup.js

function gup( name ){
	name = name.replace(/[\[]/,"\\\[").replace(/[\]]/,"\\\]");
	var regexS = "[\\?&]"+name+"=([^&#]*)";
	var regex = new RegExp( regexS );
	var results = regex.exec( window.location.href );
	if( results == null ){
		return "";
	} else{
		return results[1];
	}
}

images with no alt attributes.js

(function() {
	var imgs = document.getElementsByTagName('img');
	var imgs_no_alt = [];

	for (var i = 0; i < imgs.length; i++) {
		if( ! imgs[ i ].alt ){
			imgs_no_alt.push( imgs[i] );
		}
	}
	if( imgs_no_alt.length ){
		console.log("The following images don't have alt attributes.");
		for (var i = 0; i < imgs_no_alt.length; i++) {
			console.log( imgs_no_alt[i] );
		}
	}
	else{
		console.log('All images have alt attributes.');
	}
})();

img_AspectRatio.js

function img_AspectRatio ( width, height, max_width, max_height) {
	var ratio = Math.min( max_width / width, max_height / height);
	return { width:(width * ratio).toFixed(0), height:( height * ratio).toFixed(0) };
}

inArray.js

function inArray(needle, haystack) {
	var length = haystack.length;
	for(var i = 0; i < length; i++) {
		if(haystack[i] == needle) return true;
	}
	return false;
}