javascript - How to calculate totals based on current state of divs -


what have house plan had javascript overlaid divs.

i want create function calculates figures based on whether these div ids displayed or not , return answer.

here jsfiddle https://jsfiddle.net/offtkdqk/

function calculate_total(ppa, cpa, cpo, gar) {     var tot_price = 279500;     var = document.getelementbyid(ppa);     if (a.style.display == 'block') var ppa_tot = 1000;     var b = document.getelementbyid(cpa);     if (b.style.display == 'block') var cpa_tot = 5000;     var c = document.getelementbyid(cpo);     if (c.style.display == 'block') var cpo_tot = 6000;     var d = document.getelementbyid(gar);     if (d.style.display == 'block') var gar_tot = 9000;     var estimate = tot_price + ppa_tot + cpa_tot + cpo_tot + gar_tot;     return estimate(); }

and html:

<div id="main-bg" class="main-img">     <img src="images/house.jpg" width="100%"> </div> <div id="main-ppa" class="main-img">     <img src="images/house-paved-patio.png" width="100%"> </div> <div id="main-gar" class="main-img">     <img src="images/house-garage.png" width="100%"> </div> <div id="main-cpo" class="main-img">     <img src="images/house-covered-porch.png" width="100%"> </div> <div id="main-cpa" class="main-img">     <img src="images/house-covered-patio.png" width="100%"> </div> <div id="estimate"></div> <script>     document.getelementbyid("estimate").innerhtml = "your estimated total $" + calculate_total('main-ppa', 'main-cpa', 'main-cpo', 'main-gar'); </script>

with css like:

#main-ppa {display:none;} #main-gar {display:block;} #main-cpo {display:block;} #main-cpa {display:none;}

any appreciated.

check fiddle https://jsfiddle.net/c89rwy8y/1/

i changed @brain_bacon answer little bit computed style

function calculate_total(ppa, cpa, cpo, gar) {     var estimate = 0;     if (getdisplay(document.getelementbyid(ppa)) == 'block') {         estimate += 1000;     }     if (getdisplay(document.getelementbyid(cpa)) == 'block') {         estimate += 5000;     }     if (getdisplay(document.getelementbyid(cpo)) == 'block') {         estimate += 6000;     }     if (getdisplay(document.getelementbyid(gar)) == 'block') {         estimate += 9000;     }     return estimate; }  function getdisplay(element) {     return element.currentstyle ? element.currentstyle.display :                           getcomputedstyle(element, null).display; }  document.getelementbyid("estimate").innerhtml = "your estimated total $" + calculate_total('main-ppa', 'main-cpa', 'main-cpo', 'main-gar');

you can check limitation of getcomputedstyle here


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