Here is my html

<a href=index.php><img id=testimg   src=images/logo.png/></a>

Here is my javascript

function getW(){

    var theImg = document.getElementById('testimg');

    return theImg;

}



theImg = getW();



if (theImg.width > 119){

    document.write(theImg.width);

}

Now when I use this script it out puts the img width

However when I use this script

function getW(){

    var theImg = document.getElementsByTagName(img); 

    return theImg;

}



theImg = getW();



if (theImg.width > 119){

    document.write(theImg.width);

}

It doesn't output anything. What is the difference and why would this 2nd script work?

Thanks!