js 判断div是否启用overflow

var divobj = document.getElementById("ID");
if(divobj.style.height.match(/^\d+/) == "" +  divobj.scrollHeight)
{
document.getElementById("").style.display = "none";
}else{
       //overflow
}


if(divobj.style.width.match(/^\d+/) == "" +  divobj.scrollWidth)
{
//not overflow
}
else
{
//overflow
}