jQuery(document).ready(function(){
    jQuery('#btEnter').click(function() {
        if (jQuery('#sFName').val() == '')  {
            alert('Please enter yout First Name');
            return false;
        }
        if (jQuery('#sLName').val() == '')  {
            alert('Please enter yout Last Name');
            return false;
        }
        if (jQuery('#sAddress').val() == '')  {
            alert('Please enter yout Address');
            return false;
        }
        if (jQuery('#sPostCode').val() == '')  {
            alert('Please enter yout Postcode');
            return false;
        }
        if (!checkemail(jQuery("#sEmail").val()))   {
            alert('Please enter a valid email address.');
            return false;
        }
        if (jQuery('.cMustSel:checked').val() == null)  {
            alert('Please select an Area of interest from the list provided');
            return false;
        }
        jQuery('#competitionForm_10_2009').submit();
    });
    
    jQuery('#cAll').click(function() {
        if (jQuery('#cAll:checked').val() == 'on')    
            jQuery('.cMustSel').attr('checked', 'checked');
        else
            jQuery('.cMustSel').removeAttr('checked');
            
        
        
    });
});

function checkemail(emailstr)
{
	var emailFilter= /^(([a-zA-Z0-9_\-]+)|(([a-zA-Z0-9_\-]+)([\.]{1,1}[a-zA-Z0-9_\-]+)+)+)@((\[[0-9]{1,3}\.[0-9]{1,3}\.[0-9]{1,3}\.)|(([a-zA-Z0-9\-]+\.)+))([a-zA-Z]{2,4}|[0-9]{1,3})(\]?)$/;
	if (!(emailFilter.test(emailstr))) 
		return false;
	return true;
}