function hide(div_name) 
{
obj = document.getElementById(div_name);
if( obj.style.display == "block" ) 
	{
		obj.style.display = "none"; 
	} 
	else 
		{ 
			obj.style.display = "block"; 
		}
}
function chcolor(div_name) 
{
obj = document.getElementById(div_name);
if( obj.style.color == "lightblue" ) 
	{
		obj.style.color = "black";
		document.body.style.cursor = 'pointer'; 
	} 
}
function colorch(div_name) 
{
obj = document.getElementById(div_name);
if( obj.style.color == "black" ) 
	{
		obj.style.color = "lightblue";
		document.body.style.cursor = 'default'; 
	} 
}