/*
char1 ==> *	Compulsory
      ==> _	Optional
char2 ==> (N} Numeric only
		  (A) Alphabatic only
		  (AN) Alpha-Numeric
		  (X) Any Characters/symbols
		  {E) Email Format
		  (D) Date Format	or  (N[ ,-,:])
		  (C) Currency Format
		  (T) OR (N[-,+,(,),., ]) Telephone Format	(It accepts (),-,+ and numeric fields.)
		  
char3 ==> min:max	(for any length, use 0)

Examples :
	Put this validation combination in the Alt tag of form elements.
	
	For email validation	==>	Alt="*(E)"	OR	Alt ="_(E)"
	For 5 character username ==> alt="*(AN[-,_])5:0" 

*/

function validate(frm)
{
//	alert(frm.username.title);
	//alert(frm);
	var n = frm.elements.length;
	for(var i=0;i<n;i++)
	{
		var alt = frm.elements[i].alt;
		var val = frm.elements[i].value;
		var title = frm.elements[i].title;
		var name = frm.elements[i].name;
		if(alt && alt != "")
		{
			var comp = alt.charAt(0);
			rtn1=alt.indexOf('(');
			rtn2=alt.lastIndexOf(')');
			if(comp=="*" || comp=="_")
			{
				//alert(name + " -- " + alt);
				if(comp=="*" && val=="")
				{
					alert("Por favor, introduce "+title);
					frm.elements[i].focus();
					return false;
				}
				var valid_char = '';
				var valid_email = 'No';
				for(var j=rtn1+1; j<rtn2; j++)
				{
					//alert(alt.charAt(j));
					if(alt.charAt(j)=="N")
						valid_char += '0123456789.';
					else if(alt.charAt(j)=="A")
						valid_char += 'abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ';
					else if(alt.charAt(j)=="C")
						valid_char += '0123456789.+-';
					else if(alt.charAt(j)=="T")
						valid_char += '0123456789.+-() ';
					else if(alt.charAt(j)=="D")
						valid_char += '0123456789-/: ';
					else if(alt.charAt(j)=="E")
					{
						valid_email = "Yes";
						valid_char += 'abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ0123456789._-@';
					}
					else if(alt.charAt(j)=="X")
						valid_char = '';
					else if(alt.charAt(j)=="[")
					{
						irtn1=alt.indexOf('[');
						irtn2=alt.lastIndexOf(']');
						//alert(alt.substring(irtn1+1,irtn2));
						valid_char += alt.substring(irtn1+1,irtn2);
						j = rtn2;
					}
				}
				if(valid_email == 'Yes')
				{
					if(val==''&&comp=='_')continue;
					valid_msg = isValidEmail(frm.elements[i].value);
					if(valid_msg != 0)
					{
						alert(valid_msg);
						frm.elements[i].focus();
						return false;
					}
				}
				for(k=0;k<val.length && valid_char!='';k++)
				{
					ch=val.charAt(k);
					rtn=valid_char.indexOf(ch);
					if(rtn==-1)
					{
						alert("Por favor, introduce "+ title);
						frm.elements[i].focus();
						return false;
					}
				}
				
				// Format Validation Here

				f_str = alt.substring(rtn2+1,alt.length);
				if(f_str != "" && comp=="*")
				{
					arr = f_str.split(':');
					if(parseInt(arr[0]) > 0)
					{
						if(val.length < parseInt(arr[0]))
						{
							alert(title + " must be atleast of "+parseInt(arr[0])+" characters");
							frm.elements[i].focus();
							return false;
						} 
					}
					if(parseInt(arr[1]) > 0)
					{
						if(val.length > parseInt(arr[1]))
						{
							alert(title + " must be less than or equal of "+parseInt(arr[1])+" characters");
							frm.elements[i].focus();
							return false;
						} 
					}
				}
			}
		}
	}
	return true;
}


//******************************************************************************************//
//********************* functions  for email-id validation ****************************//
//******************************************************************************************//
function isValidEmail(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 +")*$");
	var matchArray=emailStr.match(emailPat);
	if (matchArray==null) {
		return "Email address seems incorrect (check @ and .'s)";
		//alert("Email address seems incorrect (check @ and .'s)");
		//return false;
	}
	var user=matchArray[1];
	var domain=matchArray[2];
	// Start by checking that only basic ASCII characters are in the strings (0-127).
	for (i=0; i<user.length; i++) {
		if (user.charCodeAt(i)>127) {
			return "Ths username contains invalid characters.";
			//return false;
		}
	}
	for (i=0; i<domain.length; i++) {
		if (domain.charCodeAt(i)>127) {
			return "Ths domain name contains invalid characters.";
			//return false;
		}
	}
	if (user.match(userPat)==null) {
		return "The username doesn't seem to be valid.";
		//return false;
	}
	var IPArray=domain.match(ipDomainPat);
	if (IPArray!=null) {
		for (var i=1;i<=4;i++) {
			if (IPArray[i]>255) {
				return "Destination IP address is invalid!";
				//return false;
	   		}
		}
		return 0;
	}
	var atomPat=new RegExp("^" + atom + "$");
	var domArr=domain.split(".");
	var len=domArr.length;
	for (i=0;i<len;i++) {
		if (domArr[i].search(atomPat)==-1) {
			return "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) {
		return "The address must end in a well-known domain or two letter " + "country.";
		//return false;
	}

// Make sure there's a host name preceding the domain.

	if (len<2) {
		return "This address is missing a hostname!";
		//return false;
	}	
	return 0;
}

function validatesubmit(frm)
{
	if(validate(frm))
		frm.submit();
	return false;
	
}