farbe1 = "#026AA6";
farbe2 = "#D2EFFF";
var timevar = 750; 

color001(); 
function color001() 
{ 
  for(i=0; i<document.getElementsByTagName("span").length; i++) {
document.getElementsByTagName("span")[i].style.color=farbe1;
}
 
setTimeout("color002()", timevar); 
return true; 
} 
function color002() 
{ 
  for(i=0; i<document.getElementsByTagName("span").length; i++) {
document.getElementsByTagName("span")[i].style.color=farbe2;
}
setTimeout("color001()", timevar); 
return true; 
}