var offsetx=-220;
var offsety=0;

function hideObject() {
      document.getElementById('n1').style.visibility = "hidden";
}

function showObject(e,txt,osetx,osety)
{
	if (osetx) {offsetx=osetx;} else {offsetx=-100;}
	if (osety) {offsety=osety;} else {offsety=0;}
	var posx = 0;
	var posy = 0;
	if (!e) var e = window.event;
	if (e.pageX || e.pageY)
	{
		posx = e.pageX;
		posy = e.pageY;
	}
	else if (e.clientX || e.clientY)
	{
		posx = e.clientX + document.body.scrollLeft;
		posy = e.clientY + document.body.scrollTop;
	}
	document.getElementById("text").innerHTML=txt;
	document.getElementById('n1').style.left = (posx+offsetx);
	document.getElementById('n1').style.top = (posy+offsety);
	document.getElementById('n1').style.visibility = "visible";
}

// Verify the date format:
function verifyForm(theform) {
        // Validate the format of the dates
        var dateFormatExp = /^\d{4}-\d{2}-\d{2}$/;
        if (dateFormatExp.test(theform.fecha1.value) == 0) {
                alert("Bad Format in Start Date");
                return false;
        }

        if (dateFormatExp.test(theform.fecha2.value) == 0) {
                alert("Bad Format in End Date");
                return false;
        }
        return true;
}