// JavaScript Document

/**
 * Проверка имени пользователя
 *
 */
function UserNameCheck (UserName)
{
	var UserNamePat = /^([a-zA-Z0-9._-]+)/;	
	var matchArray = UserName.match(UserNamePat);
	
	if ( matchArray == null )
	{
		return false;	
	}
	else if ( matchArray[0] != UserName )
	{
		return false;
	}
	else
	{
		return true;	
	}
}


/**
 * Проверка E-mail
 *
 */
function emailCheck (emailStr)
{
	/* The following pattern is used to check if the entered e-mail address
	fits the user@domain format. It also is used to separate the username
	from the domain. */

	//var emailPat=/^(.+)@(.+)$/
	var emailPat=/^([a-zA-Z0-9._-]+)@(.+)$/;
	/* The following string represents the pattern for matching all special
	characters. We don't want to allow special characters in the address. 
	These characters include ( ) < > @ , ; : \ " . [ ] */
	var specialChars="\\(\\)<>@,;:\\\\\\\"\\.\\[\\]";
	/* The following string represents the range of characters allowed in a 
	username or domainname. It really states which chars aren't allowed. */
	var validChars="\[^\\s" + specialChars + "\]";
	/* The following pattern applies if the "user" is a quoted string (in
	which case, there are no rules about which characters are allowed
	and which aren't; anything goes). E.g. "jiminy cricket"@disney.com
	is a legal e-mail address. */
	var quotedUser="(\"[^\"]*\")";
	/* The following pattern applies for domains that are IP addresses,
	rather than symbolic names. E.g. joe@[123.124.233.4] is a legal
	e-mail address. NOTE: The square brackets are required. */
	var ipDomainPat=/^\[(\d{1,3})\.(\d{1,3})\.(\d{1,3})\.(\d{1,3})\]$/;
	/* The following string represents an atom (basically a series of
	non-special characters.) */
	var atom=validChars + '+';
	/* The following string represents one word in the typical username.
	For example, in john.doe@somewhere.com, john and doe are words.
	Basically, a word is either an atom or quoted string. */
	var word="(" + atom + "|" + quotedUser + ")";
	// The following pattern describes the structure of the user
	var userPat=new RegExp("^" + word + "(\\." + word + ")*$");
	/* The following pattern describes the structure of a normal symbolic
	domain, as opposed to ipDomainPat, shown above. */
	var domainPat=new RegExp("^" + atom + "(\\." + atom +")*$");
	
	
	/* Finally, let's start trying to figure out if the supplied address is
	valid. */
	
	/* Begin with the coarse pattern to simply break up user@domain into
	different pieces that are easy to analyze. */
	var matchArray=emailStr.match(emailPat);
	if (matchArray==null)
	{
		/* Too many/few @'s or something; basically, this address doesn't
		even fit the general mould of a valid e-mail address. */
		alert("Your email is wrong!");
		return false;
	}
	var user=matchArray[1];
	var domain=matchArray[2];
	
	// See if "user" is valid 
	if (user.match(userPat)==null)
	{
		// user is not valid
		alert("Your email is wrong!");
		return false;
	}

	/* if the e-mail address is at an IP address (as opposed to a symbolic
	host name) make sure the IP address is valid. */
	var IPArray=domain.match(ipDomainPat);
	if (IPArray!=null)
	{
		// this is an IP address
		for (var i=1;i<=4;i++)
		{
			if (IPArray[i]>255)
			{
				alert("Your email is wrong!");
				return false;
			}
		}
		return true;
	}

	// Domain is symbolic name
	var domainArray=domain.match(domainPat);
	if (domainArray==null)
	{
		alert("Your email is wrong!");
		return false;
	}
	
	/* domain name seems valid, but now make sure that it ends in a
	three-letter word (like com, edu, gov) or a two-letter word,
	representing country (uk, nl), and that there's a hostname preceding 
	the domain or country. */
	
	/* Now we need to break up the domain to get a count of how many atoms
	it consists of. */
	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)
	{
		// the address must end in a two letter or three letter word.
		alert("Your email is wrong!");
		return false;
	}
	
	// Make sure there's a host name preceding the domain.
	if (len<2)
	{
		var errStr="Your email is wrong!";
		alert(errStr);
		return false;
	}

	// If we've gotten this far, everything's valid!
	return true;
}

/** 
 * При первом клике в указанном поле очищает его
 *
 */
function InitField(id)
{
	var obj = document.getElementById(id);
	if ( !obj.init )
	{
		obj.value = '';
		obj.init = true;
	}
}

function GoToPage(num)
{
	document.getElementById('page_num').value = num;
	document.frm_Search.submit();
}