function roll_on(obj,name)
{
	roll_on_ext(obj,name,'jpg');
}

function roll_on_ext(obj,name,ext)
{
	obj.src='images/'+name+'_over.'+ext;
}


function roll_off(obj,name)
{
	roll_off_ext(obj,name,'jpg');
}

function roll_off_ext(obj,name,ext)
{
	obj.src='images/'+name+'_off.'+ext;
}


function OpenWindow(PageLocation, WindowName, theWidth, theHeight)
{
	var AppName = navigator.appName;
	
	if (AppName == "Netscape") 
	{
		theWindow = window.open("",WindowName,"resizable,directories=0,innerHeight=" + theHeight + ",innerWidth=" + theWidth + ",location=0,menubar=0,screenX=0,screenY=0,scrollbars=1,status=0,titlebar=0,toolbar=0");
	}
	else
	{
		theWindow = window.open("",WindowName,"resizable,height=" + theHeight + ",menubar=0,scrollbars=1,status=0,location=0,width=" + theWidth + ",top=0,left=0");
	}
	
	theWindow.location = PageLocation;
	theWindow.focus();
}