// JavaScript Document
function emailCheck (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) {

/* Too many/few @'s or something; basically, this address doesn't
even fit the general mould of a valid e-mail address. */
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) {
alert("The Email username contains invalid characters.");
return false;
   }
}
for (i=0; i<domain.length; i++) {
if (domain.charCodeAt(i)>127) {
alert("The Email domain name contains invalid characters.");
return false;
   }
}

if (user.match(userPat)==null) {
alert("The Email username doesn't seem to be valid.");
return false;
}

var IPArray=domain.match(ipDomainPat);
if (IPArray!=null) {

// this is an IP address

for (var i=1;i<=4;i++) {
if (IPArray[i]>255) {
alert("The Email Destination IP address is invalid!");
return false;
   }
}
return true;
}
// Domain is symbolic name.  Check if it's valid.

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 Email domain name does not seem to be valid.");
return false;
   }
}
/* domain name seems valid, but now make sure that it ends in a
known top-level domain (like com, edu, gov) or a two-letter word,
representing country (uk, nl), and that there's a hostname preceding
the domain or country. */

if (checkTLD && domArr[domArr.length-1].length!=2 &&
domArr[domArr.length-1].search(knownDomsPat)==-1) {
alert("The Email 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) {
alert("This Email address is missing a hostname!");
return false;
}
else return true;

// If we've gotten this far, everything's valid!
//return true;
}

function formValidateContact(form1)
{
	
 	 var msg = "";
     var i = 0;
           
			if(form1.name.value =="")
			{
				msg+= "Please enter your Name!\n";
				i=i+1;
			}
									
			if (form1.email.value == "") 
			{
				msg+="Please enter your Email Address!\n";
				i=i+1;
			}
			if (form1.txtbody.value == "") 
			{
				msg+="Please enter your Message!\n";
				i=i+1;
			}
				
			
				
          if (i >= 1)
          {
            alert(msg);

            return false;
          }
          if (emailCheck (form1.email.value) == false)
		  {
		  return false;
			}
			else return true;
          
 }
 
 function validateForm(form1)
{
	
 	 var msg = "";
     var i = 0;
           
			if(form1.name.value =="")
			{
				msg+= "Please enter your Name!\n";
				i=i+1;
			}
									
			if (form1.email.value == "") 
			{
				msg+="Please enter your Email Address!\n";
				i=i+1;
			}
			if (form1.fileType.value == "") 
			{
				msg+="Please Select a File Type!\n";
				i=i+1;
			}
			if (form1.myFile.value == "") 
			{
				msg+="Please Select your file to Upload\n";
				i=i+1;
			}
			
			if (form1.txtbody.value == "") 
			{
				msg+="Please enter your Message!\n";
				i=i+1;
			}
				
			
				
          if (i >= 1)
          {
            alert(msg);

            return false;
          }
          if (emailCheck (form1.email.value) == false)
		  {
		  return false;
			}
			else return true;
          
 }
 
  function validateHW(form1)
{
	
 	 var msg = "";
     var i = 0;
           
			if(form1.name.value =="")
			{
				msg+= "Please enter your Name!\n";
				i=i+1;
			}
									
			if (form1.email.value == "") 
			{
				msg+="Please enter your Email Address!\n";
				i=i+1;
			}
			if (form1.myclass.value == "") 
			{
				msg+="Please Enter Your Class!\n";
				i=i+1;
			}
			if (form1.assignment.value == "") 
			{
				msg+="Please Enter Assignment Name\n";
				i=i+1;
			}
						
				
          if (i >= 1)
          {
            alert(msg);

            return false;
          }
          if (emailCheck (form1.email.value) == false)
		  {
		  return false;
			}
			else return true;
          
 }
 
 function surveyValidate(form1)
{
	
 	 var msg = "";
     var i = 0;
           
			if(form1.formName.value =="")
			{
				msg+= "Please enter your Name!\n";
				i=i+1;
			}
									
			if (form1.formEmail.value == "") 
			{
				msg+="Please enter your Email Address!\n";
				i=i+1;
			}
							
			
				
          if (i >= 1)
          {
            alert(msg);

            return false;
          }
          if (emailCheck (form1.formEmail.value) == false)
		  {
		  return false;
			}
			else return true;
          
 }
 function formValidateLogin(form1)
{
	
 	 var msg = "";
     var i = 0;
           
			if(form1.username.value =="")
			{
				msg+= "Please enter your UserName!\n";
				i=i+1;
			}
									
			if (form1.password.value == "") 
			{
				msg+="Please enter your Password!\n";
				i=i+1;
			}
							
			
				
          if (i >= 1)
          {
            alert(msg);

            return false;
          }
         
			else return true;
          
 }