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| jQuery.fn.isInView = function(){ | |
| // setup different vars for easier access to these values | |
| var middle = Math.round(this.height() / 2), | |
| winHeight = $(window).height(), | |
| posTop = this.position().top, | |
| scrollTop = $(window).scrollTop(), | |
| middlePos = middle + posTop; | |
| if ( middlePos < scrollTop ) { | |
| // middle of element is above the viewport | |
| return false; | |
| } else if ( middlePos > scrollTop && middlePos < scrollTop + winHeight ) { | |
| // middle of element is within the viewport | |
| return true; | |
| } else if ( middlePos > scrollTop && middlePos > scrollTop + winHeight ) { | |
| // middle of element is below the viewport | |
| return false; | |
| } | |
| } |
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