javascript - Is it possible to merge these similar functions into one function? -


i have 3 (and more) functions each exact same thing, control different enumerated divs/variables depending on div mousewheel event triggered over. i'm curious if there tricks compact these similar dumb functions 1 smart function. each div needs own #bigwrappern , #wrappern, opacityn, , colorcountern.

$('#bigwrapper1').mousewheel(function(event, delta, deltax, deltay) {     if (delta > 0) {         opacity1 = opacity1 + .05;         $('#wrapper1').css('background', "rgba("+colors[colorcounter1]+","+opacity1+")");     } else if (delta < 0) {         opacity1 = opacity1 - .05;         $('#wrapper1').css('background',"rgba("+colors[colorcounter1]+","+opacity1+")");     } });  $('#bigwrapper2').mousewheel(function(event, delta, deltax, deltay) {     if (delta > 0) {         opacity2 = opacity2 + .05;         $('#wrapper2').css('background', "rgba("+colors[colorcounter2]+","+opacity2+")");     } else if (delta < 0) {         opacity2 = opacity2 - .05;         $('#wrapper2').css('background', "rgba("+colors[colorcounter2]+","+opacity2+")");     } });  $('#bigwrapper3').mousewheel(function(event, delta, deltax, deltay) {     if (delta > 0) {         opacity3 = opacity3 + .05;         $('#wrapper3').css('background', "rgba("+colors[colorcounter3]+","+opacity3+")");     } else if (delta < 0) {         opacity3 = opacity3 - .05;         $('#wrapper3').css('background', "rgba("+colors[colorcounter3]+","+opacity3+")");     } });

use attribute starts selector. try:

$('div[id^=bigwrapper]').mousewheel(function(event, delta, deltax, deltay) {     var = $(this).attr("id").split("bigwrapper")[1];     if (delta > 0) {    opacity[i] = opacity[i] + .05;            $('div[id="wrapper'+i+'"]').css('background', "rgba("+eval('colors[colorcounter'+i+']')+","+opacity[i]+")"); } else if (delta < 0) {     opacity[i] = opacity[i] - .05;     $('div[id="wrapper'+i+'"]').css('background', "rgba("+eval('colors[colorcounter'+i+']')+","+opacity[i]+")"); } });

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