$ajax_check = "
			var postData = {
			  'field' :'username',
			  'table' : 'api_user',
			  'value' : document.".$form_name.".txt1.value,
			};	
			$.ajax({
				url: '/publics_home/api_check_existing',
				type: 'POST',
				data: postData,
				success: function(result) {
					if (result == 1) {
						document.getElementById('divError1').innerHTML = 'This username is already existed!';
						window.location = '/".$this->uri->uri_string()."#".$form_name."';
					}
					else {
						document.forms['".$form_name."'].submit();
					}
				}
			})			
		";	



		$ajax_check = "
			var postData = {
			  'field' :'username',
			  'table' : 'api_user',
			  'value' : document.".$form_name.".txt1.value,
			  'except_value' : document.".$form_name.".txt6.value,				  
			};	
			$.ajax({
				url: '/publics_home/api_check_existing_except',
				type: 'POST',
				data: postData,
				success: function(result) {
					if (result == 1) {
						document.getElementById('divError1').innerHTML = 'This username is already existed!';
						window.location = '/".$this->uri->uri_string()."#".$form_name."';
					}
					else {
						document.forms['".$form_name."'].submit();
					}
				}
			})			
		";