function change_model(){
	$('#section_parent_id').change(
			function(){
				var str="";
				var str1="";
				$("#section_parent_id option:selected").each(function () {
	                str += $(this).val();
	              });
				
				
				//if(str != 'empty')
				
					$('#section_parent_id2').load("http://"+location.host+"/search1.php?model="+str);
					
			}
	);
	
}