Javascript parsing issue on IE7

I had a problem in a page that gets it's content via an ajax request and place the result of the ajax request in a slider, I was testing it on other browsers, and It came to IE, passed IE9 and IE8, and when it came to IE7 I couldn't see the slider with it's …

How to detect client browser?

/****** Browser Detection ******/ function testCSS(prop) { return prop in document.documentElement.style; } var isOpera = !!(window.opera && window.opera.version); // Opera 8.0+ var isFirefox = testCSS('MozBoxSizing'); // FF 0.8+ var isSafari = Object.prototype.toString.call(window.HTMLElement).indexOf('Constructor') > 0; // At least Safari 3+: "[object HTMLElementConstructor]" var isChrome = !isSafari && testCSS('WebkitTransform'); // Chrome 1+ var isIE = /*@cc_on!@*/false || …