var numb = '0123456789';
var lwr = 'abcdefghijklmnopqrstuvwxyz';
var upr = 'ABCDEFGHIJKLMNOPQRSTUVWXYZ';
var per = 'اضصثقفغعهخحشسيبلاتنمظطزرذدئكگوژپآ';
var spchr = '!@#$%^&*()-_=+[]{}`~\|:",<>./';
var numneg = '-.';


function isValid(parm,val) {
  if (parm == "") return false;
  for (i=0; i<parm.length; i++) {
    if (val.indexOf(parm.charAt(i),0) == -1) return false;
  }
return true;
}

function isNum(parm) {return isValid(parm,numb);}
function isLower(parm) {return isValid(parm,lwr);}
function isUpper(parm) {return isValid(parm,upr);}
function isAlpha(parm) {return isValid(parm,lwr+upr);}
function isAlphanum(parm) {return isValid(parm,lwr+upr+numb);}
function isAll(parm) {return isValid(parm,lwr+upr+numb+spchr+per);}
function isNumneg(parm) {return isValid(parm,numb+numneg);}

function IsBadChar(strWords)
{
	var newChars=strWords;
	var badChars=new Array("select", "drop", ";", "--", "insert", "delete", "xp_");
	var errCont=0;
	
	for (i=0; i<badChars.length; i++)
	{
		if (newChars.indexOf(badChars[i])!=-1)
			errCont+=1;
	}
	if (errCont!=0)
		{
		return false;
		}
	else
		{
		return true;
		}
}

function KillBadChar(strWords)
{
	var newChars=strWords;
	var badChars=new Array("select", "drop", ";", "--", "insert", "delete", "xp_");
	for (i=0; i<badChars.length; i++)
	{
		newChars = newChars.replace(badChars[i],"");
	}
return newChars;
}


function emailCheck (emailStr) {
var checkTLD=1;
var knownDomsPat=/^(ir|com|net|org|edu|int|mil|gov|arpa|biz|aero|name|coop|info|pro|museum)$/;
var emailPat=/^(.+)@(.+)$/;
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 +")*$");
var matchArray=emailStr.match(emailPat);
if (matchArray==null) {
return false;
}
var user=matchArray[1];
var domain=matchArray[2];
for (i=0; i<user.length; i++) {
if (user.charCodeAt(i)>127) {
return false;
   }
}
for (i=0; i<domain.length; i++) {
if (domain.charCodeAt(i)>127) {
return false;
   }
}
if (user.match(userPat)==null) {
return false;
}
var IPArray=domain.match(ipDomainPat);
if (IPArray!=null) {
for (var i=1;i<=4;i++) {
if (IPArray[i]>255) {
return false;
   }
}
return true;
}
var atomPat=new RegExp("^" + atom + "$");
var domArr=domain.split(".");
var len=domArr.length;
for (i=0;i<len;i++) {
if (domArr[i].search(atomPat)==-1) {
return false;
   }
}

if (checkTLD && domArr[domArr.length-1].length!=2 && 
domArr[domArr.length-1].search(knownDomsPat)==-1) {
return false;
}
if (len<2) {
return false;
}
return true;
}