54 lines
1.5 KiB
JavaScript
54 lines
1.5 KiB
JavaScript
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/* Copyright (c) 2010
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* @author Laurence Wheway
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* Dual licensed under the MIT (http://www.opensource.org/licenses/mit-license.php)
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* and GPL (http://www.opensource.org/licenses/gpl-license.php) licenses.
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*
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* @version 1.2.0
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*/
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(function($) {
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jQuery.extend({
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isOnScreen: function(box, container) {
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//ensure numbers come in as intgers (not strings) and remove 'px' is it's there
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for(var i in box){box[i] = parseFloat(box[i])};
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for(var i in container){container[i] = parseFloat(container[i])};
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if(!container){
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container = {
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left: $(window).scrollLeft(),
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top: $(window).scrollTop(),
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width: $(window).width(),
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height: $(window).height()
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}
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}
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if( box.left+box.width-container.left > 0 &&
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box.left < container.width+container.left &&
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box.top+box.height-container.top > 0 &&
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box.top < container.height+container.top
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) return true;
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return false;
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}
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})
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jQuery.fn.isOnScreen = function (container) {
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for(var i in container){container[i] = parseFloat(container[i])};
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if(!container){
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container = {
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left: $(window).scrollLeft(),
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top: $(window).scrollTop(),
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width: $(window).width(),
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height: $(window).height()
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}
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}
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if( $(this).offset().left+$(this).width()-container.left > 0 &&
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$(this).offset().left < container.width+container.left &&
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$(this).offset().top+$(this).height()-container.top > 0 &&
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$(this).offset().top < container.height+container.top
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) return true;
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return false;
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}
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})(jQuery);
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