function num(Number) {

    var valid = "0123456789:-."
    var ok = "yes";
    var temp;
    for (var i = 0; i < Number.length; i++) {
        temp = "" + Number.substring(i, i + 1);
        if (valid.indexOf(temp) == "-1") ok = "no";
    }
    if (ok == "no") {
        alert("Invalid entry! Only numbers are accepted!");
        return false;

    }
    return true;
}
    
    
    
    function ValidateEmail(Email)
	{
		var atCharPresent = false;
		var dotPresent = false;
		for ( var Idx = 0; Idx < Email.length; Idx++ )
		{
			if ( Email.charAt ( Idx ) == '@' )
				atCharPresent = true;
			if ( Email.charAt ( Idx ) == '.' )
				dotPresent = true;
		}
		if ( !atCharPresent || !dotPresent )
			return false;
		return true;
	}
	function validate(  )
	{
		if (document.contact.Name.value =="")
		{
			alert("Please enter name.");
			document.contact.Name.focus();
			return (false);
		}


        
        
        if (document.contact.Email.value =="")
		{
			alert("Please enter email.");
			document.contact.Email.focus();
			return (false);
		}
		else
		{
			if ( !ValidateEmail( document.contact.Email.value ) )
			{
				alert( "Invalid Email " + document.contact.Email.value );
				document.contact.Email.focus( );
				return false;
			}
        }

        if (document.contact.telephone.value == "") {
            alert("Please enter telephone.");
            document.contact.telephone.focus();
            return (false);
        }

        else {
            if (!num(document.contact.telephone.value)) {

                document.contact.telephone.focus();
                return false;
            }
        }


		if (document.contact.comments.value =="")
		{
			alert("Please enter query.");
			document.contact.comments.focus();
			return (false);
		}
		document.contact.submit();
		return true;

	}
	
	function blinkIt() {
	 if (!document.all) return;
	 else {
	   for(i=0;i<document.all.tags('blink').length;i++){
	      s=document.all.tags('blink')[i];
	      s.style.visibility=(s.style.visibility=='visible')?'hidden':'visible';
	   }
	 }
	}