How to check if HTML style attribute exists with javascript

Question

I'm trying to find out if a specific element has an inline style attribute or not: I'm sure there's an easy method to check this, but I can't seem to find it. I tried multiple things already including this:

var contentWrapper = document.getElementById("contentWrapper");
if(contentWrapper.style.display.toString=="")
alert("Empty");
else
alert("Not Empty");

Thank you for your help!

Answer 1

if(contentWrapper.getAttribute("style")){
    if(contentWrapper.getAttribute("style").indexOf("display:") != -1){
        alert("Not Empty");
    } else {
        alert("Empty");
    }
}