console 命令行工具 X clear

console

var evalFx = function( key, idxlst) 
{ 
    var priceBox = document.getElementById(key); 
    priceBox = getChild(priceBox,idxlst,0);
    if(priceBox == null){
        return null;
    }
    else{
        var point = new Array(2);//规定了数组的长度为2  
        point[0] = getLeft(priceBox);  
        point[1] = getTop(priceBox);  
        return point;
    }
 };

//获取元素的纵坐标
function getTop(e){
var offset=e.offsetTop;
if(e.offsetParent!=null) offset+=getTop(e.offsetParent);
return offset;
}

//获取元素的横坐标
function getLeft(e){
var offset=e.offsetLeft;
if(e.offsetParent!=null) offset+=getLeft(e.offsetParent);
return offset;
}

function getChild(item,idxlst,idx){

    if(item == null) 
    {
        return null;
    }
    else{
        var subitem = item.children[idxlst[idx]]

        if(idx >= idxlst.length - 1){
            return subitem;
        }
        else{
            return getChild(subitem,idxlst,idx + 1);
        }
    }
}

console.log(evalFx('d',[0,1]));

<html>
    <div id = 'd'>
        d0
         <div id = 'd1'>
        d1
            <div id = 'd11'>
            d11
            </div>
            <div id = 'd12'>
            d12
            </div>
         </div>
         <div id = 'd2'>
        d2
         </div>
    </div>

    <div id = 'e'>
        <div id = 'e1'>
        e1
         </div>
         <div id = 'e2'>
        e2
         </div>
    </div>
</html>