function setLink(){
	
	var category_id = document.getElementById('gallerycat_id');	
	
	window.location = 'portfolio.php?mid='+category_id.value;
}

function goLink(){
	
	var category_id = document.getElementById('gallerycat_id');
	var offset_num = document.getElementById('offset');
	var orderby_id = document.getElementById('orderby');
	var rows_num = document.getElementById('rows');	
	
	final_offset = ((offset_num.value - 1) * rows_num.value) + 1;
	
	window.location = 'portfolio.php?mid='+category_id.value+'&GALLERY_offset='+final_offset+'&GALLERY_ORDER_BY='+orderby_id.value+'&GALLERY_rows='+rows_num.value;
}