function isEmail (object)
 {
 	var emailStr=object.value;
 	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)");
		object.focus();
		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.");
							object.focus();
							return false;   		
							}
			}
			
			for (i=0; i<domain.length; i++) 	
			{
					if (domain.charCodeAt(i)>127) 		
					{			
					alert("Ths domain name contains invalid characters.");
					object.focus();
					return false;
					}
			}
			
			if (user.match(userPat)==null)
			{
				alert("The username doesn't seem to be valid.");
				object.focus();
				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!");
											object.focus();
											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.");
								object.focus();
								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!");		
								object.focus();
								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;
}

function isReq(object)
{
	if(isBlank(object.value))
	{
		alert("This field is required.");
		object.focus();
		return false;
	}	
	return true;
}

function isPhone(object)
{
	if(isProperPhone(object.value))
	{
		return true;
	}
	alert("Please enter phone number.");
	object.focus();
	return false;
}