/*
	regarding "navSwap":
	- images must have a 3 character extension (e.g. ".jpg" or ".gif")
	- their corresponding "over" names must be identical except for a _over suffix
	- oIRef is a reference to an IMG tag as an object (e.g. "this")
*/
function navSwap(oIRef) {
	var iIRefLength	= oIRef.src.length;
	var sIRefExt	= oIRef.src.substring(iIRefLength-4);
	if ( oIRef.src.substring(iIRefLength-9) == '_over'+sIRefExt )
		oIRef.src = oIRef.src.substring(0,iIRefLength-9)+sIRefExt;
	else
		oIRef.src = oIRef.src.substring(0,iIRefLength-4)+'_over'+sIRefExt;
}


function homeOverText(image){
	var imageOb		= document.getElementById(image)
	var imageLength	= imageOb.src.length;
	var imageExt	= imageOb.src.substring(imageLength-4);
	if ( imageOb.src.substring(imageLength-9) == '_over'+imageExt )
		imageOb.src = imageOb.src.substring(0,imageLength-9)+imageExt;
	else
		imageOb.src = imageOb.src.substring(0,imageLength-4)+'_over'+imageExt;
	
	
	//if(document.getElementById(image).src != "images/home/"+image+"_over.jpg")
	//	document.getElementById(image).src = "images/home/"+image+"_over.jpg";
	//else
		//document.getElementById(image).src = "images/home/"+image+".jpg");
}
/*
      preload_image_object = new Image();
      // set image url
      image_url = new Array();
      image_url[0] = "images/home/completelistlink_over.jpg";
      image_url[1] = "images/home/facilitieslink_over.jpg";
      image_url[2] = "images/home/formslink.jpg";
      image_url[3] = "images/home/highlightslink_over.jpg";
      image_url[4] = "images/home/mediatorslink_over.jpg";
      image_url[5] = "images/home/overviewlink_over.jpg";
      image_url[6] = "images/mediators/medhead_facilitieslink_over.jpg";
      image_url[7] = "images/mediators/medhead_homelink_over.jpg";
      image_url[8] = "images/mediators/medhead_mediatorslink_over.jpg";
      image_url[9] = "images/mediators/medhead_overviewlink_over.jpg";
      image_url[10] = "images/mediators/medleftnav_forms_over.jpg";
       var i = 0;
       for(i=0; i<=10; i++) 
         preload_image_object.src = image_url[i];
*/