addLoadEvent(function() {
    $("a[@rel=external]").each(function(i){this.target="_blank";});
    $("#external a").each(function(i){this.target="_blank";});
    $(".button").bind("click", function(){showHide("#" + this.id)});
});
function showHide(x){$("div").siblings(x).toggle();}
function doSelection(x){$(".hidden").not(x).hide(); $("#" + x).show();}

/*
	Add Load Event (aka "Simon Willison is a rockstar")
*/
function addLoadEvent(func) {
	var oldonload = window.onload;
	if (typeof window.onload != 'function') {
		window.onload = func;
	} else {
		window.onload = function() {
			oldonload();
			func();
		}
	}
}