function clearText(field){
    if (field.defaultValue == field.value) field.value = '';
    else if (field.value == '') field.value = field.defaultValue;
}

function closewin(){
	if (window.opener){
		window.opener.focus();
	}
	window.close();
}

function HideContent(d) {
    document.getElementById(d).style.display = "none";
}
function ShowContent(d) {
    document.getElementById(d).style.display = "";
}