var OPERA	= (/Opera/i.test(window.navigator.userAgent)) ? true : false;
var IE		= (/MSIE/i.test(window.navigator.userAgent) && !OPERA) ? true : false;
var MOZ		= (/(Firefox|gecko)/i.test(window.navigator.userAgent)) ? true : false;
/*===========================================================================================*/
function expandDiv(obj)
{
	// [EXPAND=valor del boton]texto oculto[/EXPAND]
	var div = obj.nextSibling;
	var valor = obj.value.substring(0, obj.value.length-2);
	if (div.style.display == 'none')
	{
		div.style.display = 'block';
		obj.value = valor + " " + String.fromCharCode(9650);
	}else{
		div.style.display = 'none';
		obj.value = valor + " " + String.fromCharCode(9660);
	}
}
/*===========================================================================================*/
function ajustar_imgs(w, h)
{
	// redimensiona imagenes en las firmas
	var obj = document.getElementsByTagName('div');
	var img, i, j;
	for (i=0;i<obj.length;i++)
	{
		if (obj[i].className == 'signature')
		{
			img = obj[i].getElementsByTagName('img');
			for (j=0;j<img.length;j++)
			{
				if (img[j].offsetWidth > w) img[j].style.width = w + 'px';
				if (img[j].offsetHeight > h) img[j].style.height = h + 'px';
			}
		}
	}
}