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;
				}
		}
	}
}