function change_cell_color(cell_id,is_over,out_css)
	{if (is_over)
		{document.getElementById(cell_id).className = "row2_mouse_over";}
	else
		{document.getElementById(cell_id).className = out_css;}
	}

function change_cursor(cell_id,is_over)
	{if (is_over)
		{document.getElementById(cell_id).style.cursor = "pointer";}
	else
		{document.getElementById(cell_id).style.cursor = "default";}
	}

function change_checkbox_on_click(check_name)
	{obj = document.form1[check_name];
	
	if (obj.checked) {obj.checked = false;}
	else {obj.checked = true;}
	}

function change_object_class(obj_id,class_name)
	{document.getElementById(obj_id).className = class_name;}