function doPopups() {
  if (!document.getElementsByTagName) return false;
  var popSmall = new Array();
  var popBig = new Array();
  
  var links = document.getElementsByTagName("a");
  
  for (var i=0; i < links.length; i++) {
  		var popSize = links[i];
  
  			if (popSize.className.match("popupSmall")) {
  				popSmall.push(popSize);
  			}
  			if (popSize.className.match("popupBig")) {
  				popBig.push(popSize);
  			}
  		}
  	  
  for (var i=0; i < popSmall.length; i++) {
  		var popSizeSmall = popSmall[i];
  		popSizeSmall.onclick = function() {
  				window.open(this.href,"_popup","scrollbars=1,toolbars=0,resizable=1,location=0,width=500,height=550"); 
  				return false;
  				}
  }
  
    for (var i=0; i < popBig.length; i++) {
    	var popSizeBig = popBig[i];
    	popSizeBig.onclick = function() {
    			window.open(this.href,"_popup","scrollbars=1,toolbars=0,resizable=1,location=0,width=auto,height=auto"); 
    			return false;}
    			}
}
window.onload = doPopups;