获取隐藏元素的宽高

获取隐藏元素的宽高

/**
  * 获取隐藏元素的宽高
  * @param {Object} obj
  */
function getDomWidthOrHeight(widthOrHeight,obj){
    //console.log(widthOrHeight+"="+obj);
    var clone=obj.cloneNode(true);
    clone.style.display="block";
    clone.style.position="absolute";
　　clone.style.top=-10000px;
   obj.parentNode.appendChild(clone);
    
    var width=clone.offsetWidth;
    var height=clone.offsetHeight;
    //console.log(width+"--"+height);
    obj.parentNode.removeChild(clone);
    return widthOrHeight=="width"?width:height;    
}


/*另外一种更直接简单的方法*/
function getHeight(obj){
    obj.style.visibility='hidden';
    //obj.style.opacity=0;
    obj.style.display="block";
    obj.style.position="absolute";
　　obj.style.top=-10000px;
    var height=obj.offsetHeight;
    obj.style=''
    return height;
}