function disable_item(var_target)
	{
	var target_var			= document.getElementById(var_target);
	target_var.disabled	= true;
	//target_var.className	= "disabled";
	}

function enable_item(var_target)
	{
	//alert(var_target);
	var target_var			= document.getElementById(var_target);
	target_var.disabled	= false;
	//target_var.className	= "enabled";
	}

function change_class(var_target, var_class)
	{
	var target_var	= document.getElementById(var_target);
	target_var.className=var_class;
	}

function change_enabled(var_target, var_enabled)
	{
	var target_var	= document.getElementById(var_target);
	target_var.disabled=var_enabled;
	}

function change_enabled_class(var_target, var_enabled, var_class)
	{
	var target_var			= document.getElementById(var_target);
	target_var.disabled		= var_enabled;
	target_var.className	= var_class;
	}

function disable_enable(var_target)
	{
	var target_var	= document.getElementById(var_target);
	if (target_var.disabled==true)
		{
		target_var.disabled=false;
		target_var.className="enabled";
		}
	else
		{
		target_var.disabled=true;
		target_var.className="disabled";
		}
	}

function disable_items(my_array)
	{
	for (i=0;i<my_array.length;i++)
		{
		//alert(my_array[i]);
		disable_item(my_array[i]);
		}
	}

function enable_items(my_array)
	{
	for (i=0;i<my_array.length;i++)
		{
		//alert(my_array[i]);
		enable_item(my_array[i]);
		}
	}