function checkRadioChecked(rNm){
  var rArr =  document.getElementsByName(rNm);
  for (var i=0; i<rArr.length; i++){
     if(rArr[i].checked == true) {
	    return true; 
	 }
  }
  return false;
}

function validateAndSubmitTestQs(frmObj){
  var frmErrors = "";

  // mandatary fields
  if(frmObj.firstNm.value.length < 2)  frmErrors = frmErrors + " <li> Please start from start page   </li> " ;
  if(frmObj.lastNm.value.length < 2)  frmErrors = frmErrors + " <li>  Please  start from start page    </li> " ;
  if(frmObj.email.value.length < 2)  frmErrors = frmErrors + " <li>  Please  start from start page    </li> " ;

  for (var j=1; j<=10; j++){
     if(! checkRadioChecked("q"+j) ){
	    frmErrors = frmErrors + " <li>  Question "+j+"  not answered  </li> " ; 
	 }
  }






  var emailErrs="";
  if(frmObj.email.value) {
      emailErrs = emailCheck(frmObj.email.value);
      if(emailErrs.length > 10 ){
          frmErrors = frmErrors + " <li> "+ emailErrs + " </li> " ;
	  }
  }else{
      frmErrors = frmErrors + " <li> Please enter valid email id </li> " ;
  }

  if(frmErrors.length > 10 ){
      var errDiv = document.getElementById("errormsg");
      var errListDiv = document.getElementById("errorList");

	  errDiv.style.display =  "block" ;
	  errDiv.style.visibility =  "visible" ;
      errListDiv.innerHTML = frmErrors;
	  //
	  window.scrollTo(0,250);
  }else{
      frmObj.submit();
  }
}

function validateAndSubmit(frmObj){
  var frmErrors = "";

  // mandatary fields
  if(frmObj.firstname.value.length < 2)  frmErrors = frmErrors + " <li> Please enter valid First Name   </li> " ;
  if(frmObj.lastname.value.length < 2)  frmErrors = frmErrors + " <li>  Please enter valid Last Name    </li> " ;
  if(frmObj.company.value.length < 2)  frmErrors = frmErrors + " <li>  Please enter valid Company Name    </li> " ;


  var emailErrs="";
  var phoneErrs="";
  if(frmObj.email.value) {
      emailErrs = emailCheck(frmObj.email.value);
      if(emailErrs.length > 10 ){
          frmErrors = frmErrors + " <li> "+ emailErrs + " </li> " ;
	  }
  }else{
      frmErrors = frmErrors + " <li> Please enter valid email id </li> " ;
  }
  /*   removing phone number check 
  if(frmObj.phone.value){
      phoneErrs = phoneNumCheck(frmObj.phone.value);
      if(phoneErrs.length > 10 ){
          frmErrors = frmErrors + " <li> "+ phoneErrs + " </li> " ;
	  }
  }else{
      frmErrors = frmErrors + " <li> Please enter valid phone number  </li> " ;
  }
  */

  if(frmErrors.length > 10 ){
      var errDiv = document.getElementById("errormsg");
      var errListDiv = document.getElementById("errorList");

	  errDiv.style.display =  "block" ;
	  errDiv.style.visibility =  "visible" ;
      errListDiv.innerHTML = frmErrors;
	  errListDiv.focus();
  }else{
      frmObj.submit();
  }
}

function phoneNumCheck(phoneNum){
    var stripped = phoneNum.replace(/[\(\)\.\-\ ]/g, '');
    //strip out acceptable non-numeric characters
    if (isNaN(parseInt(stripped))) {
       return  "The phone number contains illegal characters.";
    }
    return true;
}





<!-- The JavaScript Source!! http://javascript.internet.com -->
function emailCheck (emailStr) {
    /* The following pattern is used to check if the entered e-mail address
       fits the user@domain format.  It also is used to separate the username
       from the domain. */
    var emailPat=/^(.+)@(.+)$/
    /* The following string represents the pattern for matching all special
       characters.  We don't want to allow special characters in the address. 
       These characters include ( ) < > @ , ; : \ " . [ ]    */
    var specialChars="\\(\\)<>@,;:\\\\\\\"\\.\\[\\]"
    /* The following string represents the range of characters allowed in a 
       username or domainname.  It really states which chars aren't allowed. */
    var validChars="\[^\\s" + specialChars + "\]"
    /* The following pattern applies if the "user" is a quoted string (in
       which case, there are no rules about which characters are allowed
       and which aren't; anything goes).  E.g. "jiminy cricket"@disney.com
       is a legal e-mail address. */
    var quotedUser="(\"[^\"]*\")"
    /* The following pattern applies for domains that are IP addresses,
       rather than symbolic names.  E.g. joe@[123.124.233.4] is a legal
       e-mail address. NOTE: The square brackets are required. */
    var ipDomainPat=/^\[(\d{1,3})\.(\d{1,3})\.(\d{1,3})\.(\d{1,3})\]$/
    /* The following string represents an atom (basically a series of
       non-special characters.) */
    var atom=validChars + '+'
    /* The following string represents one word in the typical username.
       For example, in john.doe@somewhere.com, john and doe are words.
       Basically, a word is either an atom or quoted string. */
    var word="(" + atom + "|" + quotedUser + ")"
    // The following pattern describes the structure of the user
    var userPat=new RegExp("^" + word + "(\\." + word + ")*$")
    /* The following pattern describes the structure of a normal symbolic
       domain, as opposed to ipDomainPat, shown above. */
    var domainPat=new RegExp("^" + atom + "(\\." + atom +")*$")
    
    
    /* Finally, let's start trying to figure out if the supplied address is
       valid. */
    
    /* Begin with the coarse pattern to simply break up user@domain into
       different pieces that are easy to analyze. */
    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 "Email address seems to be incorrect (check @ and .'s)";
    }
    var user=matchArray[1]
    var domain=matchArray[2]
    
    // See if "user" is valid 
    if (user.match(userPat)==null) {
        // user is not valid
        //alert("The email id doesn't seem to be valid.")
        return "The username doesn't seem to be valid.";
        //return false
    }
    
    /* if the e-mail address is at an IP address (as opposed to a symbolic
       host name) make sure the IP address is valid. */
    var IPArray=domain.match(ipDomainPat)
    if (IPArray!=null) {
        // this is an IP address
    	  for (var i=1;i<=4;i++) {
    	    if (IPArray[i]>255) {
    	        return "Destination IP address is invalid!";
    		//return false
    	    }
        }
        return "";
    }
    
    // Domain is symbolic name
    var domainArray=domain.match(domainPat)
    if (domainArray==null) {
    	return "The domain name doesn't seem to be valid.";
        //return false
    }
    
    /* domain name seems valid, but now make sure that it ends in a
       three-letter word (like com, edu, gov) or a two-letter word,
       representing country (uk, nl), and that there's a hostname preceding 
       the domain or country. */
    
    /* Now we need to break up the domain to get a count of how many atoms
       it consists of. */
    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) {
       // the address must end in a two letter or three letter word.
       return "The address must end in a three-letter domain suffix, or a two letter country code.";
       //return false
    }
	if(    ( domain.indexOf("hotmail") == 0   )  
		|| ( domain.indexOf("gmail") == 0  ) 
		|| ( domain.indexOf("mac") == 0  ) 
	    || ( domain.indexOf("yahoo") == 0 )  
		|| ( domain.indexOf("msn.com") == 0  ) 
		|| ( domain.indexOf("aol.com") == 0  ) 
		|| ( domain.indexOf("earthlink") == 0  ) 
		|| ( domain.indexOf("sbcglobal") == 0  ) 
		|| ( domain.indexOf("lycos") == 0  ) 
		|| ( domain.indexOf("pacbell.net") == 0  ) 
		|| ( domain.indexOf("inbox.com") == 0  ) 
		|| ( domain.indexOf("fastmail") == 0  ) 
        || ( domain.indexOf("hushmail") == 0  ) 
		|| ( domain.indexOf("indiatimes") == 0  ) 
		|| ( domain.indexOf("linuxmail") == 0  ) 
		|| ( domain.indexOf("rediffmail") == 0  ) 
		|| ( domain.indexOf("prontomail") == 0  ) 
		|| ( domain.indexOf("surfy.net") == 0  ) 
		|| ( domain.indexOf("icqmail") == 0  ) 
		|| ( domain.indexOf("bluebottle") == 0  ) 
		|| ( domain.indexOf("aussiemail") == 0  ) 
		|| ( domain.indexOf("mail.com") == 0  ) 
		|| ( domain.indexOf("myway.com") == 0  ) 
		|| ( domain.indexOf("bordermail") == 0  ) 
        )
    {
       return "Please provide your corporate email address. ";
	}
    
    // Make sure there's a host name preceding the domain.
    if (len<2) {
       var errStr="This address is missing a hostname!"
       return errStr;
       //return false
    }
    
    // If we've gotten this far, everything's valid!
    return "";
}