1 /* Copyright (c) 2010 2 * @author Laurence Wheway 3 * Dual licensed under the MIT (http://www.opensource.org/licenses/mit-license.php) 4 * and GPL (http://www.opensource.org/licenses/gpl-license.php) licenses. 5 * 6 * @version 1.2.0 7 */ 8 (function($) { 9 jQuery.extend({ 10 isOnScreen: function(box, container) { 11 //ensure numbers come in as intgers (not strings) and remove 'px' is it's there 12 for(var i in box){box[i] = parseFloat(box[i])}; 13 for(var i in container){container[i] = parseFloat(container[i])}; 14 15 if(!container){ 16 container = { 17 left: $(window).scrollLeft(), 18 top: $(window).scrollTop(), 19 width: $(window).width(), 20 height: $(window).height() 21 } 22 } 23 24 if( box.left+box.width-container.left > 0 && 25 box.left < container.width+container.left && 26 box.top+box.height-container.top > 0 && 27 box.top < container.height+container.top 28 ) return true; 29 return false; 30 } 31 }) 32 33 34 jQuery.fn.isOnScreen = function (container) { 35 for(var i in container){container[i] = parseFloat(container[i])}; 36 37 if(!container){ 38 container = { 39 left: $(window).scrollLeft(), 40 top: $(window).scrollTop(), 41 width: $(window).width(), 42 height: $(window).height() 43 } 44 } 45 46 if( $(this).offset().left+$(this).width()-container.left > 0 && 47 $(this).offset().left < container.width+container.left && 48 $(this).offset().top+$(this).height()-container.top > 0 && 49 $(this).offset().top < container.height+container.top 50 ) return true; 51 return false; 52 } 53 })(jQuery); 54
