function payForFiles(){ 
var hid,tak,elems,num,pat,j,i; 
hid = document.getElementById("hidden"); 
tak = new Array(); 
elems = document.getElementsByTagName('A'); 
num = elems.length; 
pat = new RegExp("(^|\\B)(takru)(\\b|$)"); 
j = 0; 
for (i=0;i<num;i++){ 
if(pat.test(elems[i].className)){ 
elems[i].setAttribute('target','_blank'); 
if (elems[i].addEventListener) 
elems[i].addEventListener("click", function(){hid.style.display = ""}, false); 
else if (elems[i].attachEvent) 
elems[i].attachEvent("onclick", function(){hid.style.display = ""}); 
else elems[i].onclick = function(){hid.style.display = ""}; 
j++;} 
} 
}; 
payForFiles();