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 is_alphabet(str)
{
	if((str=='a')||(str=='b')||(str=='c')||(str=='d')||(str=='e')||(str=='f')||(str=='g')||(str=='h')||(str=='i')||(str=='j')||(str=='k')||(str=='l')||(str=='m')||(str=='n')||(str=='o')||(str=='p')||(str=='q')||(str=='r')||(str=='s')||(str=='t')||(str=='u')||(str=='v')||(str=='w')||(str=='x')||(str=='y')||(str=='z')||(str=='A')||(str=='B')||(str=='C')||(str=='D')||(str=='E')||(str=='F')||(str=='G')||(str=='H')||(str=='I')||(str=='J')||(str=='K')||(str=='L')||(str=='M')||(str=='N')||(str=='O')||(str=='P')||(str=='Q')||(str=='R')||(str=='S')||(str=='T')||(str=='U')||(str=='V')||(str=='W')||(str=='X')||(str=='Y')||(str=='Z'))
		return true;
	else
		return false;
}
function strtrim(sString)
{
	while (sString.substring(0,1) == ' ')
	{
		sString = sString.substring(1, sString.length);
	}
	while (sString.substring(sString.length-1, sString.length) == ' ')
	{
		sString = sString.substring(0,sString.length-1);
	}
	return sString;
}

function is_email(emailStr) 
{
	var emailPat=/^(.+)@(.+)$/ ;
	var specialChars="\\(\\)<>@,;:\\\\\\\"\\.\\[\\]";
	var validChars="\[^\\s" + specialChars + "\]";
	var quotedUser="(\"[^\"]*\")";
	var ipDomainPat=/^\[(\d{1,3})\.(\d{1,3})\.(\d{1,3})\.(\d{1,3})\]$/ ;
	var atom=validChars + '+' ;
	var word="(" + atom + "|" + quotedUser + ")";
	var userPat=new RegExp("^" + word + "(\\." + word + ")*$");
	var domainPat=new RegExp("^" + atom + "(\\." + atom +")*$");
	var matchArray=emailStr.match(emailPat);
	if (matchArray==null) 
	{
		//alert("Email address seems incorrect (check @ and .'s)");
		return false;
	}
	var user=matchArray[1];
	var domain=matchArray[2];
	if (user.match(userPat)==null) 
	{
		//alert("The username doesn't seem to be valid.");
		return false;
	}
	var IPArray=domain.match(ipDomainPat);
	if (IPArray!=null) 
	{
		  for (var i=1;i<=4;i++) 
		  {
			if (IPArray[i]>255) 
			{
				//alert("Destination IP address is invalid!");
				return false;
			}
		}
		return true;
	}
	var domainArray=domain.match(domainPat);
	if (domainArray==null) 
	{
		//alert("The domain name doesn't seem to be valid.");
		return false;
	}
	var atomPat=new RegExp(atom,"g");
	var domArr=domain.match(atomPat);
	var len=domArr.length;
	if (domArr[domArr.length-1].length<2 || domArr[domArr.length-1].length>3) 
	{
	   //alert("The address must end in a three-letter domain, or two letter country.");
	   return false;
	}
	if (len<2) 
	{
	   //alert("This address is missing a hostname!");
	   return false;
	}
	return true;
}

function toggle_all_checkboxes(root_checkbox, o_form)
{
	var set_value_to = root_checkbox.checked;
	for (var i = 0; i < o_form.elements.length; i++) 
	{
		if (o_form.elements[i].type == "checkbox")
		{
			o_form.elements[i].checked = set_value_to;
		}
	}
}

function redirect_to(path)
{
	if(strtrim(path) == '')
		path = '?a=index&m=home';
	window.location.href=path;
}

function goback()
{
	history.back();	
}

function open_file(file_path)
{
	newWindow = window.open(file_path,"opener_file","status=no,menubar=no,toolbar=no,resizable=no,scrollbar=yes,width=672,height=500");
	newWindow.focus( );
}

function isInt(elm) 
{
	var elmstr = elm.value + "";
	var pattern="^([0-9])+$";
	//if (elmstr == "") return false;
	if(!elmstr.match(pattern)) return false;
	return true;
}