Check if a div does NOT exist with javascript

Question

Checking if a div exists is fairly simple

if(document.getif(document.getElementById(\'if\')){

}

But how can I check if a div with the give

Answer 1

Check both my JavaScript and JQuery code :

JavaScript:

if (!document.getElementById('MyElementId')){
    alert('Does not exist!');
}

JQuery:

if (!$("#MyElementId").length){
    alert('Does not exist!');
}