var div_act='x';
var isIE=document.all?true:false;
var isDOM=document.getElementById?true:false;
var isNS4=document.layers?true:false;

function showhide(_div,_act) {
  if (isDOM)
  {
    document.getElementById(_act).style.display='none';
    document.getElementById(_div).style.display='block';
  }
  else if (isIE) {
    eval("document.all."+_act+".style.display='none';");
    eval("document.all."+_div+".style.display='block';");
  }
  else if(isNS4)
  {
    eval("document.layers['"+_act+"'].display='none';");
    eval("document.layers['"+_div+"'].display='block';");
  }
  return _div;
}

function exjob(url,windowName)
{
var visina=800;
var sirina=700;
var leftPos = screen.availWidth/2-sirina/2;
var topPos =screen.availHeight/2-visina/2;
//var leftPos = 0;
//var topPos =0;

window.open(url, windowName, 'history=no,toolbar=0,location=0,directories=0,status=0,menubar=0,scrollbars=yes,resizable=yes,width=' + sirina + ',height=' + visina + ',top=' + topPos + ',left=' + leftPos);
}