//functions for form validation

function isJunk(s)

{

	var xxx 

	var tmp

	xxx = /^[A-Za-z0-9@_. \s]+$/.test(s) ;  // \s for special chars like newline tab ....

	tmp = (xxx) ? false : true 

	return tmp ;

}



function isName(s)

{

	return(/^[A-Za-z ]+$/.test(s));

}



function isPhone(n) 

{

	return(/^[0-9\(\)\+\-]+$/.test(n))

}



function isEmail(str)

{    

		str = str.replace(" ","") ;

		if(str.length==0) { return false;}

		var emailStr=str;

		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];

		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;}

			}

		}

		var domainArray=domain.match(domainPat);

		if (domainArray==null) {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) {return false;}

		if (len<2) {return false;}

return true ;

}





function isUrl(S)

{

return( /^(((http:\/\/)|(ftp:\/\/)|(file:\/\/)))[a-zA-Z0-9/._]+$/.test(S) )

}



function isZip(n)

{

	return(/^[0-9\(\)\+\-]+$/.test(n))

}