/*FUNCTION FOR THE EMAIL VALIDATIONS*/

function emailCheck (emailStr) {

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) {
      alert("Email address seems incorrect (check @ and .'s)")
      return false
  }
         var user=matchArray[1]
         var domain=matchArray[2]
         if (user.match(userPat)==null) {
             alert("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) {
                  alert("Destination IP address is invalid!")
              return false
               }
             }
             return true
         }

         // Domain is symbolic name
         var domainArray=domain.match(domainPat)
         if (domainArray==null) {
                 alert("The domain name doesn't seem to be valid.")
             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) {
            // the address must end in a two letter or three letter word.
            alert("The address must end in a three-letter domain, or two letter country.")
            return false
         }
         // Make sure there's a host name preceding the domain.
         if (len<2) {
            var errStr="This address is missing a hostname!"
            alert(errStr)
            return false
         }
        // If we've gotten this far, everything's valid!
         return true;
         }
         //  End -->
         /*FUNCTION ENDS HERE*/
		 function IsNumber(strString)
		 {
  			var strValidChars = "+-0123456789";
  			var strChar;
  			var blnResult = true;
  			if (strString.length == 0) return false;
    			for (i = 0; i < strString.length && blnResult == true; i++)
	  			{
    				strChar = strString.charAt(i);
	    			if (strValidChars.indexOf(strChar) == -1)
    				{		
	      				blnResult = false;
    				}
	  			}
	  		return blnResult;
		 }
		 
		function validate()
		{
  			docum = document.contactus;
  			if(docum.name.value=="")
  			{
    			alert("Please enter Name");
    			docum.name.focus();
    			return false;
  			}
			if(docum.email.value=="")
  			{
    			alert("Please enter Email");
    			docum.email.focus();
    			return false;
  			}
			if (emailCheck(docum.email.value)==false)
            {
                docum.email.focus();
                return false;
            }
			if(docum.comment.value=="")
  			{
    			alert("Please enter Comment / suggestion");
    			docum.comment.focus();
    			return false;
  			}
  			return true;
		}