getElementByClassName Not Returning Results

Question

My getElementByClassName() isn\'t returning any results, I had it set to getElementById(), but I can\'t use the Id since the same func

Answer 1

there is no such getElementByClassName(). Try getElementsByClassName()

Update

document.getElementsByClassName('..') returns a set of elements while your code is written with expectation that it'll return single element. You could change that part to

var myContent = document.getElementsByClassName('content');

var num = myContent.length;

for(var x=0; x < num; x++){
    myContent[x].style.display = 'block'; //or whatever style you've in your original code 
}

Answer 2

It is getElementsByClassName instead of getElementByClassName. I would also recommend using jQuery or some sort of js framework.