function fixPNG(element) {
  
  if (/MSIE (5\.5|6).+Win/.test(navigator.userAgent)) {
    
    var src;
    
    if (element.tagName=='IMG') {
    
      if (/\.png$/.test(element.src)) {
        src = element.src;
		  	element.src = "/i/tr.gif";
		  }
		
    } else {
        
      src = element.currentStyle.backgroundImage.match(/url\("(.+\.png)"\)/i);
      
      if (src) {
			
        src = src[1];
			
        element.runtimeStyle.backgroundImage="none";
      }
    }
		
    if (src) element.runtimeStyle.filter = "progid:DXImageTransform.Microsoft.AlphaImageLoader(src='" + src + "',sizingMethod='scale')";
	}
}

function showSchema(a) {
  
  var pop_window = {
         width: 720,
         height: 650,               
         left: function() {return Math.ceil((screen.availWidth - this.width)/2)},
         top: function() {return Math.ceil((screen.availHeight - this.height)/2)},
         open: function(href) {
              window.open(href, 'feedback', 'scrollbars=yes,width='+this.width+',height='+this.height+',left='+this.left()+',top='+this.top()+',resizable=0,toolbar=0,location=0,status=0,menubar=0,directories=0');
         }
     };
     
  pop_window.open(a.href); 
  
  return false;
}