统计js

function sohu_pvinsight_engine(){
    var spv_random_str = escape((new Date().getTime()) * 1000 + Math.round(Math.random() * 1000));
    var spv_screen_w = window.screen.width;
    var spv_screen_h = window.screen.height;
    var spv_referrer = (typeof(encodeURI) == 'function') ? encodeURI(document.referrer) : document.referrer;
    var spv_id = false;
    /*
     * if want stat iframe, we should add args like this
     * eg: <script type="text/javascript" src="http://js.sohu.com/mail/pv/pv.js?ifr"></script>
    */
    var key_string = 'ifr';
    var spv_channel_flag = false;
    var sct = document.getElementsByTagName('script');
    (function() {
    	var _c_s = sct[sct.length-1], _c_src = _c_s && _c_s.src;
    	if(!_c_src) return false;
    	var _p = _c_src.split('?')[1];
    	if(!_p) return false;
    	if(_p.toLowerCase().indexOf(key_string) != -1) spv_channel_flag = true;
    })();
    if (typeof _focus_pv_id != "undefined") {
        spv_id = _focus_pv_id
    } else if (typeof _pvinsight_id != "undefined") {
        spv_id = _pvinsight_id
    }
    if(document.domain.indexOf(".focus.cn") >= 0 || document.domain.indexOf("home.sohu.com") >= 0 || document.domain.indexOf("ihome.sohu.com") >= 0) {
        var spv_dhead = document.getElementsByTagName("head")[0],
	        spv_dbody = document.body,
	        d = spv_dhead || spv_dbody,
            suv_server = "//pv.focus.cn/suv",
            spv_server = "//pv.focus.cn";
    }else{
        var spv_dhead = document.getElementsByTagName("head")[0],
	        spv_dbody = document.body,
	        d = spv_dhead || spv_dbody,
            suv_server = "//pv.sohu.com/suv",
            spv_server = "//pv.sohu.com";
    }
    
    if (spv_channel_flag || top.location == self.location || document.domain.indexOf(".go2map.com") >= 0) {
        var newsuv;
        var spv_server_src;
        if (document.cookie.indexOf("SUV=") < 0 || document.cookie.indexOf("IPLOC=") < 0){
            spv_src = suv_server + "/";
        }else{
            spv_src =  spv_server + '/pv.gif';
        }
        if (spv_id) {
            spv_server_src = spv_src + '?t?=_' + spv_random_str + '_' + spv_screen_w + '_' + spv_screen_h + '_' + spv_id + '?r?=' + spv_referrer;
        }else{
            spv_server_src = spv_src + '?t?=' + spv_random_str + '_' + spv_screen_w + '_' + spv_screen_h + '?r?=' + spv_referrer;
        }
	    if (d) {
	        var _script2 = document.createElement('script');
	        _script2.src = spv_server_src;
            d.appendChild(_script2);
        } else {
		    document.write("<script type='text/javascript' src='" + spv_server_src + "'></script>");
        }
    }
}

var spv_flag;
if (!spv_flag) {
    sohu_pvinsight_engine();
}
spv_flag = 1;