// JavaScript Document

function esconde(){
	document.getElementById("avisito").style.display="none";
}
function cierra(){
	document.getElementById("tapa").style.display="none";
	document.getElementById("descripcion").style.display="none";
	document.captura.num_tareas.focus();
}
function valida(item, max, tarea) {
	if (max == 0 && tarea != 1 )
	{
		return true;
	}
	else
	{
		if (parseFloat(item.value) < 0)
		{
			alert ("Por favor ingrese un valor mayor o igual a cero");
			item.value = 0;
			return false;
		}
		else if (parseFloat(item.value) > max)
		{
			alert ("Por favor ingrese un valor menor o igual a " + max);
			item.value = 0;
			return false;
		}
	}
	return true;
}
function numsOnly(field,event)
{
	var key, keychar;
	if(window.event)
		key = window.event.keyCode;
	else if(event)
		key = event.which;
	else
		return true;
		
	keychar = String.fromCharCode(key);
	if((key==null) || (key==0) || (key==8) || (key==7) || (key==9) || (key==13) || (key==27))
		return true;
	else if (((".0123456789").indexOf(keychar) > -1))
	{
		window.status = "";
		return true;
	}
	else
	{
		window.status = "Este campo sólo acepta valores numéricos";
		return false;
	}
}