can't calculate the number of vertical divs in Safari and Chrome (mar…

…gin assumes the rest of the block), so solving this with brute force.

hashgrid.js

@@ -114,20 +114,11 @@ var hashgrid = function(set) {
 	var overlayVert = overlay.children('.vert-container');
 	var gridWidth = overlay.width();
 	overlayVert.css({width: gridWidth, position: 'absolute', top: 0});
-	overlayVert.append('<div class="vert">&nbsp;</div>');
+	overlayVert.append('<div class="vert first-line">&nbsp;</div>');
 
-	var overlayGridLines = overlayVert.children('.vert');
-	// need to temporarily set this to display: block to get the size
-	overlay.css({visibility: 'hidden', display: 'block'});
-	var overlayGridLinesWidth = overlayGridLines.outerWidth(true);
-	overlay.css({visibility: 'inherit', display: 'none'});
-	overlayGridLines.addClass('first-line');
-
-	numGridLines = Math.floor(gridWidth / overlayGridLinesWidth);
-
-	// multiply this by two to make sure we have enough lines
-	// (we *could* still run out)
-	for (i = 0; i < numGridLines * 2; i++) {
+	// 30 is an arbitrarily large number...
+	// can't calculate the margin width properly
+	for (i = 0; i < 30; i++) {
 		overlayVert.append('<div class="vert">&nbsp;</div>');
 	}