function precheck_item(szUrlVar, szFormItem)
{
	var url = window.location.search.substring(1);
	var i = url.indexOf(szUrlVar);

	if (i >= 0)
	{
	  var arr = document.getElementsByName(szFormItem);
	  var obj = null;
	  
	  if (arr != null)
	  {
		obj = arr[0];
	  }
	  
	  if (obj != null)
	  {  
	     obj.checked = true; 
	  }
	}
}

function precheck_form()
{
	precheck_item('qvdemo', "Viewer_CDROM");
	precheck_item('bscansem', "BScan_Seminar");
	precheck_item('tpqrtca', "TPQR_Free_TCA");
	
	document.docform.Navigator.value = navigator.appName + navigator.appVersion;
}