var browser = navigator.userAgent;
var brows = "";
if (/MSIE (\d+\.\d+);/.test(navigator.userAgent))
{brows = "ie";}
else if (/Firefox[\/\s](\d+\.\d+)/.test(navigator.userAgent))
{brows = "fire";}
else if (/Chrome[\/\s](\d+\.\d+)/.test(navigator.userAgent))
{brows = "chrm";}
else if (/Opera[\/\s](\d+\.\d+)/.test(navigator.userAgent))
{brows = "opra";}
else if (browser.toLowerCase().indexOf('safari') > 0)
{brows = "safri";}
else
{brows = "";};