var run=1;  
function check_br_add() {
  var ok=1;
  var rc='1px solid #ff0000',orc='1px solid #ced0a2',lc='2px solid #ff0000',olc='1px solid #ced0a2';
  var rb='#FFCCCC',orb='#ffffff';
  
  if(run) {   
    if(undefined===parent.frames['main'].document.forms['br_form']) {clearInterval(top.br_interval); return;} 
    var frm=parent.frames['main'].document.forms['br_form'];
  
    var br_title=frm.elements['br_title'];
    var br_titleSymbolsRE=/[^a-zA-Z0-9_.,()\-\!\?\n\r\'\`\& ]/;
    if(br_titleSymbolsRE.test(br_title.value)) {br_title.style.backgroundColor=rb;ok=0;}else {br_title.style.backgroundColor=orb;}
    if(!br_title.value) {br_title.style.borderLeft=lc;ok=0;} else {br_title.style.borderLeft=olc;}

    var br_description=frm.elements['br_description'];
    var br_descriptionSymbolsRE=/[^a-zA-Z0-9_.,()\-\!\?\n\r\'\`\& ]/;
    if(br_descriptionSymbolsRE.test(br_description.value)) {br_description.style.backgroundColor=rb;ok=0;}else {br_description.style.backgroundColor=orb;}
    if(!br_description.value) {br_description.style.borderLeft=lc;ok=0;} else {br_description.style.borderLeft=olc;}

    var br_height=frm.elements['br_height'];
    var br_heightSymbolsRE=/[^0-9]/;
    if(br_heightSymbolsRE.test(br_height.value)) {br_height.style.backgroundColor=rb;ok=0;}else {br_height.style.backgroundColor=orb;}
    if(!br_height.value) {br_height.style.borderLeft=lc;ok=0;} else {br_height.style.borderLeft=olc;}

    var br_width=frm.elements['br_width'];
    var br_widthSymbolsRE=/[^0-9]/;
    if(br_widthSymbolsRE.test(br_width.value)) {br_width.style.backgroundColor=rb;ok=0;}else {br_width.style.backgroundColor=orb;}
    if(!br_width.value) {br_width.style.borderLeft=lc;ok=0;} else {br_width.style.borderLeft=olc;}

    var br_counter=frm.elements['br_counter'];
    var br_counterSymbolsRE=/[^0-9]/;
    if(br_counterSymbolsRE.test(br_counter.value)) {br_counter.style.backgroundColor=rb;ok=0;}else {br_counter.style.backgroundColor=orb;}
    if(!br_counter.value) {br_counter.style.borderLeft=lc;ok=0;} else {br_counter.style.borderLeft=olc;}

    var br_interval=frm.elements['br_interval'];
    var br_intervalSymbolsRE=/[^0-9]/;
    if(br_intervalSymbolsRE.test(br_interval.value)) {br_interval.style.backgroundColor=rb;ok=0;}else {br_interval.style.backgroundColor=orb;}
        
    var br_type=frm.elements['br_type'];
    if(br_type.value == -1) {br_type.style.borderLeft=lc;ok=0;} else {br_type.style.borderLeft=olc;}
    
    var br_interval_type=frm.elements['br_interval_type'];  
    if(br_interval_type.value == -1) {br_interval_type.style.borderLeft=lc;ok=0;} else {br_interval_type.style.borderLeft=olc;}
        
    if(ok==1)frm.elements['btn_add'].disabled=false;
    else frm.elements['btn_add'].disabled=true; 
  }
}
  
  
function showIntervalRow(type) {
  if(parent.frames['main'].document.getElementById('br_interval_type').value == type)
    parent.frames['main'].document.getElementById('interval_row').style.display=''; 
  else  
    parent.frames['main'].document.getElementById('interval_row').style.display='none'; 
}