function changeStyle(obj, new_style) {
    obj.className = new_style;
}

// Application Buttons //
var ISOCODE;
//Service & Body Shop
var imgOnAppointment = new Image(253,48);
imgOnAppointment.src = '/images/image.php?file=buttons/ENG/appointment2.gif';
var imgOffAppointment = new Image(253,48);
imgOffAppointment.src = '/images/image.php?file=buttons/ENG/appointment1.gif';

// MORE INFO BUTTON
var imgOnInfo = new Image(253,48);
imgOnInfo.src = '/images/image.php?file=buttons/ENG/more_info2.gif';
var imgOffInfo = new Image(253,48);
imgOffInfo.src = '/images/image.php?file=buttons/ENG/more_info1.gif';

//Parts
var imgOnPartsRequest = new Image(253,48);
imgOnPartsRequest.src = '/images/image.php?file=buttons/ENG/parts_request2.gif';
var imgOffPartsRequest = new Image(253,48);
imgOffPartsRequest.src = '/images/image.php?file=buttons/ENG/parts_request1.gif';

//Finance
var imgOnCreditApp = new Image(253,48);
imgOnCreditApp.src = '/images/image.php?file=buttons/ENG/credit_app2.gif';
var imgOffCreditApp = new Image(253,48);
imgOffCreditApp.src = '/images/image.php?file=buttons/ENG/credit_app1.gif';

<!--Misc JS -->
function showStatus(sMsg) {//used often
	//setTimeout("window.status = \'" + sMsg + "\';", 0);
    window.status = sMsg ;
    return true ;
}
function openWindow(url,width,height){
	newWin = window.open(url, 'viewWin', 'toolbar=0,location=0,status=0,menubar=0,scrollbars=1,resizable=1,left='+(screen.width-width)/2+',top='+(screen.height-height)/2+',width=' + width + ',height=' + height + '');
}		

function changeImg(imgName,imgPre) {
	if(document.images){
		document.images[imgName].src = eval(imgPre + '.src');
	}
}

function changeStyle(obj, new_style) {
    obj.className = new_style;
}
function expandableContent(callObj, obj, expandedStyle, collapsedStyle) {//used for collapsable content only (include only when necessary)
		var element = document.getElementById(obj);
		
		if	(callObj.className == 'expanded')
		{
			element.className = expandedStyle;
			callObj.className = 'collapsed';
			callObj.innerHTML = 'More...';
		}
		else
		{
			element.className = collapsedStyle;
			callObj.className = 'expanded';
			callObj.innerHTML = 'Less...';
		}
			
}
<!-- End Misc JS -->