function changeImage(a)
{
	
	if(a==1)
	{
		document.all.coronary.style.visibility="visible";
		return false;
	}

	else if(a==2)
	{
		document.all.peripheral.style.visibility="visible";
		return false;
	}

	else if(a==3)
	{
		document.all.balloon.style.visibility="visible";
		return false;
	}

	else if(a==4)
	{
		document.all.pacemaker.style.visibility="visible";
		return false;
	}

	else if(a==5)
	{
		document.all.deepvein.style.visibility="visible";
		return false;
	}

	else if(a==6)
	{
		document.all.varicose.style.visibility="visible";
		return false;
	}

	else if(a==7)
	{
		document.all.ivcfilter.style.visibility="visible";
		return false;
	}

	else if(a==8)
	{
		document.all.misc.style.visibility="visible";
		return false;
	}

	else if(a==0)
	{
		document.all.coronary.style.visibility="hidden";
		document.all.peripheral.style.visibility="hidden";
		document.all.balloon.style.visibility="hidden";
		document.all.pacemaker.style.visibility="hidden";
		document.all.deepvein.style.visibility="hidden";
		document.all.varicose.style.visibility="hidden";
		document.all.ivcfilter.style.visibility="hidden";
		document.all.misc.style.visibility="hidden";
		return false;
	}


}