How to remove ajax loader in my code

Question

How to remove ajax loader in my code. I want to disable the loader only

function changeValue(url, attribute,coulmnAttr,value){
 var url = url + '?attribute=' + attribute + '&attributeValue=' + value + '&coulmnAttr=' + coulmnAttr;
 new Ajax.Request(url, {
 method: 'get',
 asynchronous: false
 });
}

Answer 1

I used the below Code & its Done

Element.hide('loading_mask_loader');