function changeColour(elementId) 
{
var interval = 2000;
var colour1 = "#007c51";
var colour2 = "#0247d3";
var colour3 = "#afb4b8";
if (document.getElementById) 
{
var element = document.getElementById(elementId);
        									switch(element.style.color) 
        									{
        										case colour1:
        										new_color = colour2;
        										break;
        										case colour2:
        										new_color = colour3;
        										break;
        										case colour3:
        										new_color = colour1;
        										break;
        										default:
        										new_color = colour1;
        									}
        									element.style.color = new_color;
        									setTimeout("changeColour('" + elementId + "')", interval);
    									}
								}