function concactCheck( frm ){
	if(!isValid(frm.name,'Name')) return false;
	if(!noSplCharsExSpace(frm.name)) return false;
	if(!isValid(frm.email,'Email ID')) return false;
	if(!isValidEmail(frm.email,'yes')) return false;
	if(!isValid(frm.comments,'Comments')) return false;
}


function isValid(element, msg ){
	var ele = element;
	if( ele.value == null || ele.value =='' ){ 
		alert("Plese enter "+msg);
		ele.focus();
		return false;
	}else { return true; }
}

function noSplCharsExSpace(Val)
{
	var alp = "abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ0123456789. ";
	for (var i=0;i<Val.value.length;i++){
		temp=Val.value.substring(i,i+1);
		if (alp.indexOf(temp)==-1){
			alert("No special characters \nValid entries are [a-z][A-Z][0-9][space]");
			Val.focus();
			return false;
		}
	} // closing the for loop
	return true;
} // closing the function SplCharactersSpace()

function noSplChars(element) 
{
	var alp = "abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ0123456789_";
	for (var i=0;i<element.value.length;i++)
	{
		temp=element.value.substring(i,i+1);
		if (alp.indexOf(temp)==-1)
		{
			alert("No special characters\r\nValid entries are [a-z][A-Z][0-9][ _ ]");
			element.focus();
			return false;
		}
	} // closing the for loop
	 return true;
} // closing the function SplCharacters()

function isValidEmail(element, required)
{
	var VarEmail = element.value;
	if(VarEmail == "")
	{
		var rval = trim(required);
		if (rval.toLowerCase() == "yes" || rval == 1)
		{
			alert("Please enter Email ID");
			element.focus();
			return false;
		}
	}	
	if(VarEmail != "")
	{
		var emailStr = VarEmail;
		 
		var emailPat=/^(.+)@(.+)$/
		var specialChars="\\(\\)<>@,;:\\\\\\\"\\.\\[\\]"
		var validChars="\[^\\s" + specialChars + "\]"
		var firstChars=validChars
		var quotedUser="(\"[^\"]*\")"
		var ipDomainPat=/^\[(\d{1,3})\.(\d{1,3})\.(\d{1,3})\.(\d{1,3})\]$/
		var atom="(" + firstChars + validChars + "*" + ")"
		var word="(" + atom + "|" + quotedUser + ")"
		var userPat=new RegExp("^" + word + "(\\." + word + ")*$")
		var domainPat=new RegExp("^" + atom + "(\\." + atom +")*$")
		var matchArray=emailStr.match(emailPat)
		if (matchArray==null) 
		{
			 alert("Email address seems to be incorrect (check @ and .'s)");
			 element.focus();
			 return false;
		}
		var user=matchArray[1]
		var domain=matchArray[2]
		if (user.match(userPat)==null) 
		{
			alert("The username doesn't seem to be valid.");
			element.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!");
					 element.focus();
					 return false;
				}
			}
		}
		var domainArray=domain.match(domainPat)
		if (domainArray==null) 
		{
			alert("The domain name doesn't seem to be valid.");
			element.focus();
			return false;
		}
		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) 
		{
		   alert("The address must end in a three-letter domain, or two letter country.");
		   element.focus();
		   return false;
		}
		if (domArr[domArr.length-1].length==2 && len<3) 
		{
			var errStr = "This address ends in two characters, which is a country";
			errStr    += " code.  Country codes must be preceded by ";
			errStr	  += "a hostname and category (like com, co, pub, pu, etc.)";
			alert(errStr);
			element.focus();
			return false;
		}
		if (domArr[domArr.length-1].length==3 && len<2) 
		{
			 var errStr="This address is missing a hostname!";
			 alert(errStr);
			 element.focus();
			 return false;
		}
	}
	return true;
}