function sizeChange(chng) {
	$('Resumen').setStyle({fontSize: getCurrentSize('Resumen')+chng});
	$('Titulo').setStyle({fontSize: getCurrentSize('Titulo')+chng});

	var childs = $('Cuerpo').select('p');
	for (var x=0;x<childs.length;x++)	{
		$(childs[x]).setStyle({fontSize: getCurrentSize(childs[x])+chng});
	}
}
function getCurrentSize(field) {
	return (new Number($(field).getStyle('font-size').substring(0,$(field).getStyle('font-size').indexOf('px'))));
	}	
function PaginaInicio(obj) {
	if(document.all)	
	obj.style.behavior='url(#default#homepage)';obj.setHomePage('http://www.mundomaritimo.cl');
}

function validar_registro_home(form1) {
	if (emailCheck(form1.email.value) == false) {
		form1.email.focus();
		return false;
	}
	if (okSoFar == 1) {
		return true;
	}
}

FormFlag = false;
function delete_default(field)
{
	if (FormFlag == false) {
		FormFlag = true;
		field.value='@';
	}
}
var screenW = 640, screenH = 480;

if (parseInt(navigator.appVersion)>3) {
 screenW = screen.width;
 screenH = screen.height;
}
else if (navigator.appName == "Netscape" 
    && parseInt(navigator.appVersion)==3
    && navigator.javaEnabled()
   ) {
	var jToolkit = java.awt.Toolkit.getDefaultToolkit();
	var jScreenSize = jToolkit.getScreenSize();
	screenW = jScreenSize.width;
	screenH = jScreenSize.height;
}


function popUp_EstadodePuertos(URL){
	W = 825; H = 460; left = 100; topPos = 150;
	if (825 > screenW) {
		W = screenW - 25
		left = 15;
		topPos = 20;
		if (800 > screenW)
			H = 400;
	}
		
  	WINpopUp_1 = window.open(URL, 'popUp_1','width=' + W + ',height=' + H + ',top=' + topPos + ',toolbar=1,left=' + left + ',scrollbars=auto,resizable=no')
}



function popUp_2(URL){
  	WINpopUp_2 = window.open(URL, 'popUp_2','width=750,height=500,top=150,toolbar=1,left=100,scrollbars=yes,resizable=no')
}