function inizialize(counting){selectbox="tuner"+counting;selectboxname=document.getElementById(selectbox);unitcount=0;for(var unitnaming=1;unitnaming<=units.length;unitnaming++){labelname="label"+unitnaming;productname="product"+unitnaming;labelelement=document.getElementById(labelname);productelement=document.getElementById(productname);if((document.forms['selectForm'].tune1.value==productelement.value)||(document.forms['selectForm'].tune2.value==productelement.value)||(document.forms['selectForm'].tune3.value==productelement.value)||(document.forms['selectForm'].tune4.value==productelement.value)){}else{unitcount=unitcount+1;selectboxname[unitcount]=new Option(labelelement.value,productelement.value,'')}}}function existent(selectboxnumber){existentunit1=document.forms['selectForm'].tune1.value;existentswitch1=document.getElementById(existentunit1);existentunit2=document.forms['selectForm'].tune2.value;existentswitch2=document.getElementById(existentunit2);existentunit3=document.forms['selectForm'].tune3.value;existentswitch3=document.getElementById(existentunit3);existentunit4=document.forms['selectForm'].tune4.value;existentswitch4=document.getElementById(existentunit4);if(selectboxnumber<2){if(existentswitch1==null){}else{existentswitch1.style.display='none';document.forms['selectForm'].tuner2.disabled=true}}if(selectboxnumber<3){if(existentswitch2==null){}else{existentswitch2.style.display='none';document.forms['selectForm'].tune2.value="";document.forms['selectForm'].tuner3.disabled=true}}if(selectboxnumber<4){if(existentswitch3==null){}else{existentswitch3.style.display='none';document.forms['selectForm'].tune3.value="";document.forms['selectForm'].tuner4.disabled=true}}if(selectboxnumber<=4){if(existentswitch4==null){}else{existentswitch4.style.display='none';document.forms['selectForm'].tune4.value=""}}}function tunerselect1(unitname){if(unitname!=null){sel=document.forms['selectForm'].tuner1;for(var i=1;i<sel.options.length;i++){if(sel.options[i].value==unitname){sel.options[i].selected=true}}tunerselect1()}else{existent("1");unitname1=document.forms['selectForm'].elements['tuner1'].value;document.forms['selectForm'].tune1.value=unitname1;unitswitch1=document.getElementById(unitname1);unitswitch1.style.display='inline-block';unitswitch1.style.left='0px';inizialize('2');document.forms['selectForm'].tuner2.disabled=false}}function tunerselect2(unitname){if(unitname!=null){sel=document.forms['selectForm'].tuner2;for(var i=1;i<sel.options.length;i++){if(sel.options[i].value==unitname){sel.options[i].selected=true}}tunerselect2()}else{existent("2");unitname2=document.forms['selectForm'].elements['tuner2'].value;document.forms['selectForm'].tune2.value=unitname2;unitswitch2=document.getElementById(unitname2);unitswitch2.style.display='inline-block';unitswitch2.style.left='144px';inizialize('3');document.forms['selectForm'].tuner3.disabled=false}}function tunerselect3(unitname){if(unitname!=null){sel=document.forms['selectForm'].tuner3;for(var i=1;i<sel.options.length;i++){if(sel.options[i].value==unitname){sel.options[i].selected=true}}tunerselect3()}else{existent("3");unitname3=document.forms['selectForm'].elements['tuner3'].value;document.forms['selectForm'].tune3.value=unitname3;unitswitch3=document.getElementById(unitname3);unitswitch3.style.display='inline-block';unitswitch3.style.left='288px';inizialize('4');document.forms['selectForm'].tuner4.disabled=false}}function tunerselect4(unitname){if(unitname!=null){sel=document.forms['selectForm'].tuner4;for(var i=1;i<sel.options.length;i++){if(sel.options[i].value==unitname){sel.options[i].selected=true}}tunerselect4()}else{existent("4");unitname4=document.forms['selectForm'].elements['tuner4'].value;document.forms['selectForm'].tune4.value=unitname4;unitswitch4=document.getElementById(unitname4);unitswitch4.style.display='inline-block';unitswitch4.style.left='432px'}}function resetPage(){unitname1=document.forms['selectForm'].elements['tuner1'].value;unitswitch1=document.getElementById(unitname1);unitswitch1.style.display='none';unitname2=document.forms['selectForm'].elements['tuner2'].value;unitswitch2=document.getElementById(unitname2);unitswitch2.style.display='none';unitname3=document.forms['selectForm'].elements['tuner3'].value;unitswitch3=document.getElementById(unitname3);unitswitch3.style.display='none';unitname4=document.forms['selectForm'].elements['tuner4'].value;unitswitch4=document.getElementById(unitname4);unitswitch4.style.display='none';document.forms['selectForm'].tune1.value='';document.forms['selectForm'].tune2.value='';document.forms['selectForm'].tuner2.disabled=true;document.forms['selectForm'].tune3.value='';document.forms['selectForm'].tuner3.disabled=true;document.forms['selectForm'].tune4.value='';document.forms['selectForm'].tuner4.disabled=true;inizialize('4');inizialize('3');inizialize('2');inizialize('1')}