function EnterCatch()
{
 var nav = window.Event ? true : false;  
 
 if (nav)  
 {  
   window.captureEvents(Event.KEYDOWN);  
   window.onkeydown = NetscapeEventHandler_KeyDown;  
 }  
 else  
 {  
   document.onkeydown = MicrosoftEventHandler_KeyDown;  
 }  
}
 
function NetscapeEventHandler_KeyDown(e)  
{
	if (e.which == 13 && e.target.name == 'ctrlHeader:search_string')
	{
	  document.getElementById("ctrlHeader_Image1").focus();
	  return true;
	}
  if (e.which == 13 && e.target.type != 'textarea' && e.target.type != 'submit') { return false; }  
  return true;  
}  
 
function MicrosoftEventHandler_KeyDown()  
{  
	if (event.keyCode == 13 && event.srcElement.name == 'ctrlHeader:search_string')
	{
	  document.getElementById("ctrlHeader_Image1").focus();
	  return true;
	}
  if (event.keyCode == 13 && event.srcElement.type != 'textarea' && event.srcElement.type != 'submit') {
    
    return false;  
  } 
  return true;  
}