js和jQuery获取滚动条滚动距离

$(document).scrollTop(); 
$(document).scrollLeft();

/**
 * 获取滚动条距离顶端的距离
 * @return {}支持IE6
 */
function getScrollTop() {
    var scrollPos;
    if (window.pageYOffset) {
    	scrollPos = window.pageYOffset;
    }else if (document.compatMode && document.compatMode != 'BackCompat'){
    	scrollPos = document.documentElement.scrollTop;
    }else if (document.body) {
    	scrollPos = document.body.scrollTop;
    } 
    return scrollPos; 
}