Filtering and Web Audio

I'm trying to implement some filters using Web Audio.

I have the below set-up and only the lowpass filter works, but even then I can't seem to get it to stop.

          //Creating filters, setting their types and setting up booleans for later use.
      //Lowpass Filter Setup
      lowpass = context.createBiquadFilter();
      lp_bool=false;
      lowpass.type="lowpass";
      lowpass.type=LOWPASS;

      //Highpass Filter Setup
      highpass = context.createBiquadFilter();
      highpass.type="highpass";
      highpass.type=HIGHPASS;
      hp_bool=false;

      //Bandpass Filter Setup
      bandpass = context.createBiquadFilter();
      bandpass.type="bandpass";
      bandpass.type=BANDPASS;
      bp_bool=false;

      //Lowshelf Filter Setup
      lowshelf = context.createBiquadFilter();
      lowshelf.type="lowshelf";
      lowshelf.type=LOWSHELF;
      ls_bool=false;
      /*
      lowshelf.frequency.value = 440;
      lowshelf.gain.value = 0;*/

      //Highshelf Filter Setup
      highshelf = context.createBiquadFilter();
      highshelf.type="highshelf";
      highshelf.type=HIGHSHELF;
      hs_bool=false;/*
      highshelf.frequency.value = 440;
      highshelf.gain.value = 0;*/

      //Peaking Filter Setup
      peaking = context.createBiquadFilter();
      peaking.type="peaking";
      peaking.type=PEAKING;
      pk_bool=false;/*
      peaking.frequency.value = 440;
      peaking.Q.value = 0;
      peaking.gain.value = 0;*/

      //Notch Filter Setup
      notch = context.createBiquadFilter();
      notch.type="notch";
      notch.type=NOTCH;
      nh_bool=false;/*
      notch.frequency.value = 440;
      notch.Q.value = 0;*/

      //Allpass Filter Setup
      allpass = context.createBiquadFilter();
      allpass.type="allpass";
      allpass.type=ALLPASS;
      ap_bool=false;/*
      allpass.frequency.value = 440;
      allpass.Q.value = 0;*/
    };

Toggle Function:

function toggle_filter(filter_name,filter_bool) {
      masterVolume.disconnect(0);
      // Check if we want to enable the filter.
      if (filter_bool==false) {
        // Connect through the filter.
        masterVolume.connect(filter_name);
        filter_name.connect(context.destination);
        filter_bool=true;
      } else if(filter_bool==true){
        filter_name.disconnect(0);
        // Otherwise, connect directly.
        masterVolume.connect(context.destination);
        filter_bool=false;
      }
    };

Called from buttons:

<div id="filter-container">
<a onclick="toggle_filter(lowpass,lp_bool);" id="filter-button">Lowpass</a>
<a onclick="toggle_filter(highpass,hp_bool);" id="filter-button">Highpass</a>
<a onclick="toggle_filter(bandpass,bp_bool);" id="filter-button">Bandpass</a>
<a onclick="toggle_filter(lowshelf,ls_bool);" id="filter-button">Lowshelf</a>
<a onclick="toggle_filter(highshelf,hs_bool);" id="filter-button">Highshelf</a>
<a onclick="toggle_filter(peaking,pk_bool);" id="filter-button">Peaking</a>
<a onclick="toggle_filter(notch,nh_bool);" id="filter-button">Notch</a>
<a onclick="toggle_filter(allpass,ap_bool);" id="filter-button">Allpass</a>
<div>

Can anyone point me in the direction of where I'm going wrong?