// Macromedia functions 
function MM_preloadImages() { //v3.0 
  var d=document; if(d.images){ if(!d.MM_p) d.MM_p=new Array(); 
    var i,j=d.MM_p.length,a=MM_preloadImages.arguments; for(i=0; i<a.length; i++) 
    if (a[i].indexOf("#")!=0){ d.MM_p[j]=new Image; d.MM_p[j++].src=a[i];}} 
}

function MM_swapImgRestore() { //v3.0 
  var i,x,a=document.MM_sr; for(i=0;a&&i<a.length&&(x=a[i])&&x.oSrc;i++) x.src=x.oSrc; 
} 

function MM_findObj(n, d) { //v4.01 
  var p,i,x;  if(!d) d=document; if((p=n.indexOf("?"))>0&&parent.frames.length) { 
    d=parent.frames[n.substring(p+1)].document; n=n.substring(0,p);} 
  if(!(x=d[n])&&d.all) x=d.all[n]; for (i=0;!x&&i<d.forms.length;i++) x=d.forms[i][n]; 
  for(i=0;!x&&d.layers&&i<d.layers.length;i++) x=MM_findObj(n,d.layers[i].document); 
  if(!x && d.getElementById) x=d.getElementById(n); return x; 
} 

function MM_swapImage() { //v3.0 
  var i,j=0,x,a=MM_swapImage.arguments; document.MM_sr=new Array; for(i=0;i<(a.length-2);i+=3) 
   if ((x=MM_findObj(a[i]))!=null){document.MM_sr[j++]=x; if(!x.oSrc) x.oSrc=x.src; x.src=a[i+2];} 
} 

// Self-added functions 
function validateNewsletterSearchForm() { 
  var i = true; 
  var msg = "递交前请更正以下错误:\n\n"; 
  with (document.newsletterSearchForm) { 
    if ((year.options[year.selectedIndex].value == "-1") && (month.options[month.selectedIndex].value == "-1")) { 
      msg += "- 请选择年份\n"; 
      msg += "- 请选择月份\n"; 
      i = false; 
    } 
    if ((year.options[year.selectedIndex].value == "-1") && (month.options[month.selectedIndex].value != "-1")) { 
      msg += "- 请选择年份\n"; 
      i = false; 
    } 
  } 
  if (!i) 
    alert(msg); 
  else 
    document.newsletterSearchForm.submit(); 
}