function isEmail (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) 

	{

		alert("Email address seems incorrect (check @ and .'s)");

		return false;

	}

	var user=matchArray[1];

	var domain=matchArray[2];



	for (i=0; i<user.length; i++) 

	{

		if (user.charCodeAt(i)>127) 

		{

			alert("Ths username contains invalid characters.");

			return false;

   		}

	}

	for (i=0; i<domain.length; i++) 

	{

		if (domain.charCodeAt(i)>127) 

		{

			alert("Ths domain name contains invalid characters.");

			return false;

   		}

	}





	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 atomPat=new RegExp("^" + atom + "$");

	var domArr=domain.split(".");

	var len=domArr.length;

	for (i=0;i<len;i++) 

	{

		if (domArr[i].search(atomPat)==-1) 

		{

			alert("The domain name does not seem to be valid.");

			return false;

   		}

	}

		/*

	if (checkTLD && domArr[domArr.length-1].length!=2 && domArr[domArr.length-1].search(knownDomsPat)==-1) 

	{

		alert("The address must end in a well-known domain or two letter country.");

		return false;

	}

	*/

	if (len<2) 

	{

		alert("This address is missing a hostname!");

		return false;

	}

	return true;

}



function isBlank(str)

{

	if(trim(str) == "") 

	{

		return true;

	}

	else

	{	

		return false;

	}

}



function isNotAlphabets(str)

{

	for (var i = 0; i < str.length; i++)

	{

		var ch = str.substring(i, i + 1);

		if((ch < "a" || "z" < ch) && (ch < "A" || "Z" < ch) ) 

		{

			return true;

		}

	}

	return false;

}

function isProperPhone(str)

{

	ch = str.substring(0, 1);

	if((ch > "9" || ch < "0") )

	{

		return false;

	}



	for (var i = 1; i < str.length; i++)

	{

		var ch = str.substring(i, i + 1);

		

		if((ch > "9" || ch < "0") && (ch != "-" && ch != "/" && ch != " "))

		{

			

			return false;

		}

	}

	return true;

}

function trim(str)

{

	var str1=""

	if(str=="" || str==" ")

	{

		return ""

	}

	else

	{

		for(var i=0;i<str.length;i++)

		{

					

		var x=str.substring(i,i+1)

			

		if(x!=" ")

		{

			str1=str.substring(i,str.length)

			break

		}

				}

		for(var j=str1.length;j>0;j--)

		{

			var y=str1.substring(j-1,j)

			if(y!=" ")

			{

				str1=str1.substring(0,j)

				break

			}

		}

	return str1

	}

}

function isAddress(object)

{

	if(isBlank(object.value))

	{

		alert("Please enter the address")

		object.focus();

		return false;

	}

	return true;

}

function isCity(object)

{

	if(isBlank(object.value))

	{

		alert("Please enter the name of the city")

		object.focus();

		return false;

	}

	return true;

}



function isState(object)

{

	if(isBlank(object.value))

	{

		alert("Please enter the state")

		object.focus();

		return false;

	}

	return true;

}



function isZip(object)

{

	if(isBlank(object.value))

	{

		//alert("Please enter the ZIP")

		object.focus();

		return false;

	}

	return true;

}