function openHelpWin(url) {
   winHelp = open(url, "winHelp", "width=335, height=420, resizable=yes, scrollbars, screenx=30, screeny=30");
   winHelp.focus();
}

function openMailWin(url) {
   winMail = open(url, "winMail", "width=450, height=500, resizable=yes, scrollbars, screenx=30, screeny=30");
   winMail.focus();
}

function openSchemaWin(url) {
   winSchema = open(url, "winSchema", "width=700, height=500, resizable=yes, scrollbars, screenx=30, screeny=30");
   winSchema.focus();
}

// toggles the display of the content within span tags
function toggle_span(spanid)
{
	node = document.getElementById(spanid);

	if (node.style.display == "none")
	{
		node.style.display = "";
	}
	else
	{
		node.style.display = "none";
	}
}