function checkBrowser(){this.ver=navigator.appVersion;this.agent=navigator.userAgent;this.dom=document.getElementById?1:0;this.opera5=(this.agent.indexOf("Opera 5")>-1)?1:0;this.mac=(this.agent.indexOf("Mac")>-1)?1:0;this.ie6=(this.ver.indexOf("MSIE 6")>-1&&this.dom&&!this.opera5)?1:0;this.ie55=(this.ver.indexOf("MSIE 5.5")>-1&&this.dom&&!this.opera5)?1:0;this.ie5=(this.ver.indexOf("MSIE 5")>-1&&this.dom&&!this.opera5)?1:0;this.ie4=(document.all&&!this.dom&&!this.opera5)?1:0;this.ns6=(this.dom&&parseInt(this.ver)>=5)?1:0;this.ns4=(document.layers&&!this.dom)?1:0;this.ie4plus=(this.ie6||this.ie55||this.ie5||this.ie4);this.ie5plus=(this.ie6||this.ie55||this.ie5);this.ie55plus=(this.ie6||this.ie55);this.bw=(this.ie4plus||this.ns4||this.ns6||this.opera5);return this}bw=new checkBrowser();