jQuery(document).ready( function() {
	/* Ask IE6 user to upgrade */
	if (jQuery.browser.msie && jQuery.browser.version < 7 ) {
		alert("This website does not support Microsoft Internet Explorer " + jQuery.browser.version + ". Please upgrade to a newer version, or use Mozilla Firefox.");
	}
	/* Rollovers for main menu */
	var preloads = new Array;
	var links = ["home","welcome","issues","subscribe","press","contact"];
	jQuery.each(links, function(){
		var preload = new Image;
		preload.src = "images/menu/" + this + "_ro.png";
		preloads.push(preload);
	});

	jQuery("#nav li:not(.current_page_item, .current_page_ancestor, .current_page_parent) a").each( function() {
		jQuery(this).hover(
			function() {
				var bg = jQuery(this).css('background-image');
				if (bg.search(/_ro/) == -1) {
					jQuery(this).css("background-image", bg.replace(/.png/,"_ro.png"));
				}
			},
			function() {
				var bg = jQuery(this).css('background-image');
				if (bg.search(/_ro/) != -1) {
					jQuery(this).css("background-image", bg.replace(/_ro.png/,".png"));
				}
			}
		);
	});
});