Javascript custom addClass of method

 
//Element: the element that needs to be added with a new style, value: the new style
function addClass(element, value ){ 
if (!element.className){ 
element.className = value; 
}else { 
newClassName = element.className; 
newClassName+= " "; 
newClassName+= value ; 
element.className = newClassName; 
} 
}