jQuery(function($){
    
    // parse subjects //
    
    var subIsCustArr = new Array();        
    $('#subject_selectBox option[isCust="true"]').each(function(){
        
        subIsCustArr[$(this).val()] = $(this).context.text;
        
    
    });
        
    var subNotCustArr = new Array();
    $('#subject_selectBox option[isCust="false"]').each(function(){
    
       subNotCustArr[$(this).val()] = $(this).context.text;
    
    });
    
    
    // remove all subject on page load //
    $('#subject_selectBox').removeOption(/./);
            
    // on load event for radio button //
    isCust = $('#frmContactUs input:radio:checked[name="isCustomer"]').val();
        
	if ( isCust === "true")
	{
		// remove all subjects
		$('#subject_selectBox').removeOption(/./);
		
		// add not customer subjects
		$('#subject_selectBox').addOption(subIsCustArr, false);
	}
	
	if ( isCust === "false")
	{
		// remove all subjects
		$('#subject_selectBox').removeOption(/./);
		
		// add not customer subjects
		$('#subject_selectBox').addOption(subNotCustArr, false);
	}
    
    
    // on change event for radio button //    
	$('#frmContactUs input:radio[name="isCustomer"]').change(function(){
	
		isCust = $(this).val();
		
		if ( isCust === "true" )
		{
			// remove all subjects
			$('#subject_selectBox').removeOption(/./);
			
			// add not customer subjects
			$('#subject_selectBox').addOption(subIsCustArr, false);
		}
		
		if ( isCust === "false" )
		{
			// remove all subjects
			$('#subject_selectBox').removeOption(/./);
			
			// add not customer subjects
			$('#subject_selectBox').addOption(subNotCustArr, false);
		}
			
	});
    

});