function rollOn(imgName)
{
	imgOn=eval(imgName+"on.src");
	document[imgName].src= imgOn;
}

function rollOff(imgName)
{
	imgOff=eval(imgName+"off.src");
	document[imgName].src= imgOff;
}

top_mmtsbon= new Image();
top_mmtsbon.src="./imgs/topbar_topright1_on.jpg";
top_mmtsboff= new Image();
top_mmtsboff.src="./imgs/topbar_topright1.jpg";

top_contacton= new Image();
top_contacton.src="./imgs/contact_on.jpg";
top_contactoff= new Image();
top_contactoff.src="./imgs/contact_off.jpg";

frstimeon= new Image();
frstimeon.src="./imgs/firsttime_on.jpg";
frstimeoff= new Image();
frstimeoff.src="./imgs/firsttime_off.jpg";

MailListon= new Image();
MailListon.src="./imgs/maillist_sm_on.gif";
MailListoff= new Image();
MailListoff.src="./imgs/maillist_sm_off.gif";