function getPosX(obj) {
	var curleft = 0;
	if(obj.offsetParent)
	while(1) {
		curleft += obj.offsetLeft;
		if(!obj.offsetParent) break;
		obj = obj.offsetParent;
       } else if(obj.x) curleft += obj.x;
   	return curleft;
}

function getPosY(obj) {
	var curtop = 0;
	if(obj.offsetParent)
       while(1) {
		curtop += obj.offsetTop;
		if(!obj.offsetParent) break;
		obj = obj.offsetParent;
       } else if(obj.y) curtop += obj.y;
	return curtop;
}

function onEnterSubmit(event,form) {

	if(document.all) {// Internet Explorer
		var tecla = event.keyCode;
	} else {//Nestcape
		var tecla = event.which;
	}
	
	if(tecla == 13) form.submit();
	
}