function check(){
	var chkbox;
	
	chkbox = document.getElementById('html_email');
	
	if(chkbox){
		chkbox.checked=true;
	}
}

if (window.addEventListener)
window.addEventListener("load", check, false)
else if (window.attachEvent)
window.attachEvent("onload", check)
else if (document.getElementById)
window.onload=check