function eq () {
if (document.getElementById("prvi_stubac")){
var razlika1;var razlika2; var stanje1;
var a=document.getElementById("prvi_stubac").offsetHeight;
var b=document.getElementById("drugi_stubac").offsetHeight;
var c=document.getElementById("treci_stubac").offsetHeight;
if (a>b && a>c) {stanje1='a';} if (b>c && b>a) {stanje1='b';} if (c>a && c>b) {stanje1='c';}

  if (stanje1 =='a'){
    razlika1=a-c;   razlika2=a-b;
    document.getElementById("ps4").style.height = razlika1/2;
    document.getElementById("ps6").style.height = razlika1/2;
    document.getElementById("ps1").style.height = razlika2/2;
    document.getElementById("ps2").style.height = razlika2/2;
  }
  
  if (stanje1 =='b'){
    razlika1=b-a;   razlika2=b-c;
    document.getElementById("ps3").style.height = razlika1/2;
    document.getElementById("ps5").style.height = razlika1/2;
    document.getElementById("ps4").style.height = razlika2/2;
    document.getElementById("ps6").style.height = razlika2/2;
  }
  
  if (stanje1 =='c'){
    razlika1=c-a;   razlika2=c-b;
    document.getElementById("ps3").style.height = razlika1/2;
    document.getElementById("ps5").style.height = razlika1/2;
    document.getElementById("ps1").style.height = razlika2/2;
    document.getElementById("ps2").style.height = razlika2/2;
  }
} else if (document.getElementById("clanak_content")) {
document.getElementById("clanak_prvi_stubac").style.height = document.getElementById("clanak_content").offsetHeight;
document.getElementById("clanak_pre_treci_stubac").style.height = document.getElementById("clanak_content").offsetHeight;
document.getElementById("clanak_treci_stubac").style.height = document.getElementById("clanak_content").offsetHeight - 20;
}
}