function changeclass(IDs, class1, class2) {

var IDarray = IDs.split(',');
for (var i=0; i<IDarray.length; i++)
{
	var NAME = document.getElementById(IDarray[i])
	if (NAME.className==class1) {
		NAME.className=class2
	}
	//else if (NAME.className == class2) {
		//NAME.className=class1
	//}
}
}