getPos.js

/**
 * 取得对向的大小和坐标 兼容多种浏览器
 * @param {Object} owner
 */
var getPos = function(owner){
    if(owner == undefined){
        return {top : 0, left:0 , width : 0, height : 0};
    }

    var e = owner;
    var oTop = e.offsetTop;
    var oLeft = e.offsetLeft;
    var oWidth = e.offsetWidth;
    var oHeight = e.offsetHeight;
    while(e = e.offsetParent)
    {
        oTop += e.offsetTop;
        oLeft += e.offsetLeft;
    }

    return {
        top : oTop,
        left : oLeft,
        width : oWidth,
        height : oHeight
    }
}