$(function(){

    var browser = (function(){
    var ua = window.navigator.useragent.tolowercase(), sys = null, s;
    if(s = ua.match(/rv:([\d.]+)\) like gecko/)){sys = {type:'ie',version:s[1]};}
    else if(s = ua.match(/msie ([\d.]+)/)){sys = {type:'ie',version:s[1]};}
    else if(s = ua.match(/firefox\/([\d.]+)/)){sys = {type:'firefox',version:s[1]};}
    else if(s = ua.match(/chrome\/([\d.]+)/)){sys = {type:'chrome',version:s[1]};}
    else if(s = ua.match(/opera.([\d.]+)/)){sys = {type:'opera',version:s[1]};}
    else if(s = ua.match(/version\/([\d.]+).*safari/)){sys = {type:'safari',version:s[1]};}
    else if(s = ua.match(/ucbrowser\/([\d.]+)/)){sys = {type:'uc',version:s[1]};}
    else if(s = ua.match(/micromessenger\/([\d.]+)/)){sys = {type:'wx',version:s[1]};}
    else{sys = {type:'unknown',version:'unknown'};}
    sys.ismobile = !!ua.match(/applewebkit.*mobile.*!/) || !!ua.match(/(iphone|ipod|android|ios|ipad)/i);
    return sys;
  })();
	
	/*检测ie*/
    if(browser.type =="ie" && browser.version < 8){
        location.href="http://www.jltech.cn/upgradebrowser/";
    }

    /*判断谷歌27*/
    if(browser.type == 'chrome' && browser.version <= 27){
        $('.font_scale8, .font_scale10').addclass('font_adjust');
    }
     
	
    
    


	/*======返回顶部======*/
 
	window.onload = function(){
		imgcenter(".index .section3 .list .img ");
		imgcenter(".business_list2 ul li.lis .img");
	}
})
 	function imgcenter(s) {
		$(s).each(function() {
			var t = $(this),
				i = $(this).children("img"),
				r1 = t.width() / t.height(),
				r2 = i.width() / i.height();
			if(r1 > r2) {
				$(this).children("img").css({
					'margin-top': (t.height() - (t.width() / r2)) / 2,
					'width': '100%',
					'height': t.width() / r2
				});
			} else {
				$(this).children("img").css({
					'margin-left': (t.width() - (t.height() * r2)) / 2,
					'width': t.height() * r2,
					'height': '100%'
				});
			}
		})
	}