Hi everyone, My team has put together some JS to create an additional constant sum total on a matrix table. It works perfectly, but when we go to submit the data on the preview it comes up with the below error: ! The code we're using is below - it also includes functions to replace zeros with blank space and widens the input boxes: Qualtrics.SurveyEngine.addOnload(function() { /*Place your JavaScript here to run when the page loads*/ var a = 0; var b = 0; while (a<6){ while (b<9){ if(this.getChoiceValue(a,b) == 0) { this.setChoiceValue(a,b,""); } b++; } b = 0; a++; } { var inputWidth = "75px"; var q = jQuery("#"+this.questionId); q.find('Input').css("width", inputWidth); q.find('.SumInput').css("width", inputWidth); q.find('.SumTotal').css("width", inputWidth); q.find('.InputText').css("width", inputWidth); }; }); Qualtrics.SurveyEngine.addOnReady(function() { /*Place your JavaScript here to run when the page is fully displayed*/ this.questionclick = function(event,element){ var i =0; /*Setting column number for loopage*/ while (i<9){ var a = parseInt(this.getChoiceValue(1,i),10); var b = parseInt(this.getChoiceValue(2,i),10); var c = parseInt(this.getChoiceValue(3,i),10); var d = parseInt(this.getChoiceValue(4,i),10); var e = parseInt(this.getChoiceValue(5,i),10); if(isNaN(a)){ /*check if div by 0*/ a= 0; } if(isNaN(b)){ /*check if div by 0*/ b= 0; } if(isNaN(c)){ /*check if div by 0*/ c= 0; } if(isNaN(d)){ /*check if div by 0*/ d= 0; } if(isNaN(e)){ /*check if div by 0*/ e= 0; } var x = a+b+c+d+e ; this.setChoiceValue (6,i,x); /*Increase column number*/ i++; }} }); Qualtrics.SurveyEngine.addOnUnload(function() { /*Place your JavaScript here to run when the page is unloaded*/ }); Any ideas on the error?? Thanks, Rose