diff --git a/app/assets/javascripts/cancer_predict.js b/app/assets/javascripts/cancer_predict.js
index 1272aaf..5ddd4b2 100644
--- a/app/assets/javascripts/cancer_predict.js
+++ b/app/assets/javascripts/cancer_predict.js
@@ -89,9 +89,9 @@ $(document).ready(function(){
 	});
 	$('.cancer_help_btn').off("click").on('click',function(){
 		var modal_head = "";
-		try{ modal_head = $(this).parent().find(">label").html()}catch{};
+		try{ modal_head = $(this).parent().find(">label").html()}catch(e){};
 		var modal_body = "";
-		try{ modal_body = $(this).parent().find(">input.help_texts").attr('value')}catch{};
+		try{ modal_body = $(this).parent().find(">input.help_texts").attr('value')}catch(e){};
 		$('#show_help_modal').html("<div class='modal-dialog'><div class='modal-content'><div class='modal-header'><button type='button' aria-hidden='true' class='close'>×</button><h4 class='modal-title'>"+modal_head+"</h4>"+
 			"</div><div class='modal-body'>"+modal_body+"</div><div class='modal-footer'><button type='button' class='btn btn-default'>Close</button></div></div></div>")
 		$('#show_help_modal').modal('show');
@@ -141,7 +141,7 @@ $(document).ready(function(){
 				var input_value = $(this).parent().find('.num_only').data('range')[0];
 				if(input_value != undefined)
 					$(this).parent().find('.num_only').val(input_value);
-			}catch{
+			}catch(e){
 				$(this).parent().find('.num_only').val(0);
 			};
 			if($(this).parent().find('.num_only').val() != ""){
@@ -193,7 +193,7 @@ $(document).ready(function(){
 					if(input_value != undefined)
 						$(this).parent().find('.num_only').val(input_value);
 				}
-			}catch{
+			}catch(e){
 				$(this).parent().find('.num_only').val(0);
 			};
 			if($(this).parent().find('.num_only').val() != ""){
@@ -215,7 +215,7 @@ $(document).ready(function(){
 			if($('.cancertable_empty').length == 0){
 				$('#danger_texts').remove();
 			};
-		}catch{};
+		}catch(e){};
 		$(this).addClass('active');
 	});
 	$('#cancer_table_reset').click(function(){
@@ -301,7 +301,7 @@ $(document).ready(function(){
 				$('#result_table_content .cancer_years').off('click').on('click',function(){
 					try{
 						$(this).parent().find('.cancer_years').removeClass('active');
-					}catch{};
+					}catch(e){};
 					$(this).addClass('active');
 					$('#current_year').attr('index',$(this).attr('index'));
 					$('#current_year').attr('value',$(this).html());
@@ -319,7 +319,7 @@ $(document).ready(function(){
 				$('#result_text_content .cancer_years').click(function(){
 					try{
 						$(this).parent().find('.cancer_years').removeClass('active');
-					}catch{};
+					}catch(e){};
 					$(this).addClass('active');
 					$('#current_year').attr('value',$(this).html());
 					$('#current_year').attr('index',$(this).attr('index'));
@@ -451,7 +451,7 @@ $(document).ready(function(){
 							if($('.cancertable_empty').length == 0){
 								$('#danger_texts').remove();
 							};
-						}catch{};
+						}catch(e){};
 						$(this).addClass('active');
 						if(!click_flag){
 							if(!active_treatment.includes($(this).parent().attr('id'))){
@@ -472,7 +472,7 @@ $(document).ready(function(){
 							if($('.cancertable_empty').length == 0){
 								$('#danger_texts').remove();
 							};
-						}catch{};
+						}catch(e){};
 						$(this).addClass('active');
 						if(!click_flag){
 							if(active_treatment.includes($(this).parent().attr('id'))){
@@ -571,7 +571,7 @@ $(document).ready(function(){
 		result['age2'] = Math.pow((Number(result_json['age'])/100),0.5)*Math.log(result_json['age']/100);
 		result['size1'] = Math.log(Number(result_json['size'])/10);
 		if(Number(result_json['lymph_nodes_examined']) != 0)
-			try{result['ratio'] = Number(result_json['lymph_nodes_positive'])/Number(result_json['lymph_nodes_examined'])}catch{result['ratio']  = 0}
+			try{result['ratio'] = Number(result_json['lymph_nodes_positive'])/Number(result_json['lymph_nodes_examined'])}catch(e){result['ratio']  = 0}
 		else
 			result['ratio'] = 0
 		if(result['ratio'] > 1)
@@ -655,7 +655,7 @@ $(document).ready(function(){
 		result['lpv'] = ((result['age1']-0.7276655)*(-10.87)+(result['age2']+0.4540707)*8.968+(result['size1']-0.643632)*0.7678+(result['nposit']-1.346932)*0.5339+
 						result['grade_2']*0.4795+result['grade_3']*0.818+result['subtype_HER2']*0.1806+result['subtype_triple']*0.6457+result['pstage_2']*0.5311+
 						result['pstage_3']*1.134+result['pstage_4']*2.172+result['lvi_yes']*0.3321-0.04);
-		}catch{result['lpv'] = "error"};
+		}catch(e){result['lpv'] = "error"};
 		return result;
 	};
 	function submit_fcn(){