function ChangeDisplayImage(groupID,colourID,extn) {
	document.getElementById('inviteImg').innerHTML='<img src="images/'+groupID+'_'+colourID+'.'+extn+'" alt="'+groupID+'_'+colourID+'" height="250" width="250"><p><b>Colour Code: '+colourID+'</b><br>Colour choice is the <b>darkest</b> colour in the design. All other colours are tints of the chosen colour</p>';
}