function clickButton(e, buttonid){ 
var bt = document.getElementById(buttonid); 
	if (typeof bt == 'object'){ 
		if(navigator.appName.indexOf("Netscape")>(-1)){ 
			if (e.keyCode == 13){ 
			bt.click(); 
		return false; 
		} 
	} 
	if (navigator.appName.indexOf("Microsoft Internet Explorer")>(-1)){ 
		if (event.keyCode == 13){ 
		bt.click(); 
		return false; 
		} 
	} 
	} 
}