function showInfo(tt,obj,sum)
    {
        var num = document.getElementById(sum).value;
        var dads  = document.getElementById(obj).style;
        var ttop  = tt.offsetTop;     //TT控件的定位点高
        var thei  = tt.clientHeight;  //TT控件本身的高
        var tleft = tt.offsetLeft;    //TT控件的定位点宽
        var ttyp  = tt.type;          //TT控件的类型
        while (tt = tt.offsetParent){ttop+=tt.offsetTop; tleft+=tt.offsetLeft;}
        dads.top = ttop+thei-(104+(num*19))-num*5;
        dads.left = tleft-1;
        dads.display = 'inline';
    }
    
    function hideInfo(id)
    {
       document.getElementById(id).style.display = "none";
    }