function elementByID(elementID){if(document.getElementById){return document.getElementById(elementID);}else if(document.all){return document.all[elementID];}else{return eval("document."+elementID);}}
function changeFooterColour(colour){elementByID('body').style.backgroundColor='rgb('+colour+')';var numbers=colour.split(',');total=0;for(i=0;i<=2;i++){total+=parseInt(numbers[i]);}
if(total<380||total==765){elementByID('footer').className='light';}else{elementByID('footer').className='dark';}}