/////////////////////////////////////////////
// Add :nth-of-type() selector to all browsers	 							
/////////////////////////////////////////////
function getNthIndex(cur, dir) {
	var t = cur, idx = 0;
	while (cur = cur[dir] ) {
		if (t.tagName == cur.tagName) {
			idx++;
		}
	}
	return idx;
}
function isNthOf(elm, pattern, dir) {
	var position = getNthIndex(elm, dir), loop;
	if (pattern == "odd" || pattern == "even") {
		loop = 2;
		position -= !(pattern == "odd");
	} else {
		var nth = pattern.indexOf("n");
		if (nth > -1) {
			loop = parseInt(pattern, 10);
			position -= (parseInt(pattern.substring(nth + 1), 10) || 0) - 1;
		} else {
			loop = position + 1;
			position -= parseInt(pattern, 10) - 1;
		}
	}
	return (loop<0 ? position<=0 : position >= 0) && position % loop == 0
}
var pseudos = {
	"first-of-type": function(elm) {
		return getNthIndex(elm, "previousSibling") == 0;
	},
	"last-of-type": function(elm) { 
		return getNthIndex(elm, "nextSibling") == 0;
	},
	"only-of-type": function(elm) { 
		return pseudos["first-of-type"](elm) && pseudos["last-of-type"](elm);
	},
	"nth-of-type": function(elm, b, match, all) {
		return isNthOf(elm, match[3], "previousSibling");
	},
	"nth-last-of-type": function(elm, i, match) {
		return isNthOf(elm, match[3], "nextSibling");
	}        
}
$.extend($.expr[':'], pseudos);

jQuery(document).ready(function($){
	
	/////////////////////////////////////////////
	// Set grid post clear							
	/////////////////////////////////////////////
	$(".grid4 .post:nth-of-type(4n+1), .grid4 .category-section .post:nth-of-type(4n+1)").css({"margin-left":"0"}).before("<div style='clear:both;'></div>");
	$(".grid3 .post:nth-of-type(3n+1), .grid3 .category-section .post:nth-of-type(3n+1)").css({"margin-left":"0"}).before("<div style='clear:both;'></div>");
	$(".grid2 .post:nth-of-type(2n+1), .grid2 .category-section .post:nth-of-type(2n+1)").css({"margin-left":"0"}).before("<div style='clear:both;'></div>");
	$(".grid2-thumb .post:nth-of-type(2n+1), .grid2-thumb .category-section .post:nth-of-type(2n+1)").css({"margin-left":"0"}).before("<div style='clear:both;'></div>");

	/////////////////////////////////////////////
	// HTML5 placeholder fallback	 							
	/////////////////////////////////////////////
	$('[placeholder]').focus(function() {
	  var input = $(this);
	  if (input.val() == input.attr('placeholder')) {
	    input.val('');
	    input.removeClass('placeholder');
	  }
	}).blur(function() {
	  var input = $(this);
	  if (input.val() == '' || input.val() == input.attr('placeholder')) {
	    input.addClass('placeholder');
	    input.val(input.attr('placeholder'));
	  }
	}).blur();
	$('[placeholder]').parents('form').submit(function() {
	  $(this).find('[placeholder]').each(function() {
	    var input = $(this);
	    if (input.val() == input.attr('placeholder')) {
		 input.val('');
	    }
	  })
	});
	
	/////////////////////////////////////////////
	// Scroll to top 							
	/////////////////////////////////////////////
	$('.back-top a').click(function () {
		$('body,html').animate({
			scrollTop: 0
		}, 800);
		return false;
	});

});