function $(o)
{
   return document.getElementById(o) ? document.getElementById(o) : o;
}

function trim(val)
{
	var str = val+"";
	if (str.length == 0) return str;
	var re = /^\s*/;
	str = str.replace(re,'');
	re = /\s*$/;
	return str.replace(re,'');
}

function popWindow(url)
{
	var win = window.open(url,'newwindow','height=600,width=700,top=100,left=300,toolbar=no,menubar=no,scrollbars=yes,resizable=no,location=no,status=no');
	win.focus();
	return true;
}

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_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_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];}
}

function SearchFormCheck(frm)
{
	var o = $("SearchForm_words");
	if (typeof o == "undefined")
	{
		return false;
	}
	if (trim(o.value) == "")
	{
		alert('must input search words');
		return false;
	}
	return true;
}