JS Element in View

element_in_view.js

####### Function takes jQuery object as argument
####### currently working only for one element
var isInView = function($element){
    elementOffsetTop = $element.offset().top;
    elementHeight = $element.outerHeight();
    windowTop = document.body.scrollTop;
    windowHeight = window.innerHeight;
    if( elementOffsetTop < (windowTop + windowHeight)
        && (elementOffsetTop + elementHeight) > windowTop)
        return true;
    return false;
}