function WebForm_FireDefaultButton(event, target) 
{
    //event.srcElement doesn't work in FF so we check whether
    //it or event.target exists, using whichever is returned
    var element = event.target || event.srcElement;
    
    if (event.keyCode == 13 && !(element && element.tagName.toLowerCase() == "textarea"))         
    {        
        var defaultButton;        
        
        if (__nonMSDOMBrowser)         
        {            
            defaultButton = document.getElementById(target);        
        }         
        else         
        {            
            defaultButton = document.all[target];        
        }   
             
        if (defaultButton && typeof defaultButton.click != "undefined")         
        {            
            defaultButton.click();  
                      
            event.cancelBubble = true;    
                    
            if (event.stopPropagation)             
            {                
                event.stopPropagation();            
            }        
                
            return false;        
        }   
        else if(defaultButton)
        {
            document.location = defaultButton;
            
            event.cancelBubble = true;            
            if (event.stopPropagation)             
            {                
                event.stopPropagation();            
            }            
            return false;    
        } 
   }    
   
   return true;
}