function ChkNull(str) {
	if (!str) {	return false; }
	else { return true; }
}

function ChkSEng(str) {
	for (i=0;i<str.length;i++) {
		subStr=str.charAt(i);
		if (subStr<'a' || subStr>'z') { return false; }
	}
	return true;
}

function ChkLEng(str) {
	for (i=0;i<str.length;i++) {
		subStr=str.charAt(i);
		if (subStr<'A' || subStr>'Z') { return false; }
	}
	return true;
}

function ChkCharr (str) {		
		for (z=0;z<str.length;i++) {
			subStr=str.charAt(i);
			if (subStr=='"' || subStr=='&' || subStr=='<' || subStr=='>' || subStr=='|') { return false; }
		}
		return true;
}

function ChkNumber(str) {
	for (i=0;i<str.length;i++) {
		subStr=str.charAt(i);
		if (subStr<'0' || subStr>'9') { return false; }
	}
	return true;
}

function ChkSEngNumber(str) {
	for (i=0;i<str.length;i++) {
		subStr=str.charAt(i);
		if (subStr<'0' || (subStr>'9' && subStr<'a') || subStr>'z') { return false; }
	}
	return true;
}

function ChkMail (emailStr) { 

var checkTLD=1; 
var knownDomsPat=/^(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; 
} 

function Chk_Register_No(str1, str2) {

		var li_lastid,li_mod,li_minus,li_last;
		var value0,value1,value2,value3,value4,value5,value6;
		var value7,value8,value9,value10,value11,value12;

		li_lastid = parseFloat(str2.substring(6,7));
		value0 = parseFloat(str1.substring(0,1)) * 2;
		value1 = parseFloat(str1.substring(1,2)) * 3;
		value2 = parseFloat(str1.substring(2,3)) * 4;
		value3 = parseFloat(str1.substring(3,4)) * 5;
		value4 = parseFloat(str1.substring(4,5)) * 6;
		value5 = parseFloat(str1.substring(5,6)) * 7;
		value6 = parseFloat(str2.substring(0,1)) * 8;
		value7 = parseFloat(str2.substring(1,2)) * 9;
		value8 = parseFloat(str2.substring(2,3)) * 2;
		value9 = parseFloat(str2.substring(3,4)) * 3;
		value10 = parseFloat(str2.substring(4,5)) * 4;
		value11 = parseFloat(str2.substring(5,6)) * 5;
		value12 = 0;

		value12 = value0+value1+value2+value3+value4+value5+value6+value7+value8+value9+value10+value11+value12 ;
		li_mod = value12 % 11;
		li_minus = 11 - li_mod;
		li_last = li_minus % 10;

		if (li_last != li_lastid){

				return false;
		}
			return true;	
}