/*the base image directory location*/
var base = "/images/";


/*********
switch an image with an ID
*********/
function switchImage(thisId,thisImageSlice)
{
	//is the text "_off" inside this btn?
	if (document.getElementById(thisId).src.indexOf('_off.') < 0)
	{
		thisImg=base+thisImageSlice+thisId+'_off.gif';
	}
	else
	{
		thisImg=base+thisImageSlice+thisId+'_on.gif';
	}
	//set the image
	document.getElementById(thisId).src=thisImg;
}