// Display element by changing its css display property 
function display(element_id){
	// Get element ID
	element=document.getElementById(element_id);
	// Change style
	element.style.display='block';
}

function hide(element_id){
	// Get element ID
	element=document.getElementById(element_id);
	// Change style
	element.style.display='none';
}

// Append elements
function crElem(element_type,element_id,container_id,element_content,myEvent){
	element=document.createElement(element_type);
	element.setAttribute('id',element_id);	
	document.getElementById(container_id).appendChild(element);
	document.getElementById(element_id).innerHTML=element_content;
	element.style.marginTop=myEvent.clientY + document.body.scrollTop;
	element.style.marginLeft=myEvent.clientX;
}
			
function fCursor(element_id,myEvent){
	element=document.getElementById(element_id);
	element.style.marginTop=myEvent.clientY + document.body.scrollTop;
	element.style.marginLeft=myEvent.clientX;
}
			
function desElem(element_id,container_id){
	element=document.getElementById(element_id);
	document.getElementById(container_id).removeChild(element);
}