function openwin(url,wintype,winheight,winwidth)
{
	//Default sizes for window
	if (winheight==null) winheight='280';
	if (winwidth==null) winwidth='350';

	//give prod info windows a handle unique(ish) to the sku/qlink
	var WinID = 0;
	if (url.charCodeAt)
		for(iLoop=0;iLoop<url.length;iLoop++)
			WinID += url.charCodeAt(iLoop);

	window.name="mainwin";
	if (wintype=="popup") window.open(url, WinID, 'toolbar=0,location=0,directories=0,status=0,menubar=0,scrollbars=0,resizable=0,width=680,height=280');
	if (wintype=="popup2") window.open(url, WinID, 'toolbar=0,location=0,directories=0,status=0,menubar=0,scrollbars=1,resizable=1,width=550,height=380');
	if (wintype=="popup3") window.open(url, WinID, 'toolbar=0,location=0,directories=0,status=0,menubar=0,scrollbars=0,resizable=1,width=300,height=407');
	if (wintype=="popup4") window.open(url, WinID, 'toolbar=0,location=0,directories=0,status=0,menubar=0,scrollbars=0,resizable=0,width=735,height=350');
}