function checkBrowser() {
        var b = navigator.appName
        if (b=="Netscape") this.b = "ns"
        else if (b=="Microsoft Internet Explorer") this.b = "ie"
        else this.b = b
        this.version = navigator.appVersion
        this.hrw=(this.version.indexOf('Mac')>-1) ? 'mac': 'pc'
        this.app=(document.all) ? 'ie': 'ns'
		this.dom=(document.getElementById) ? true : false
        this.v = parseInt(this.version)
        this.ns = (this.b=="ns" && this.v>=4)
        this.ns4 = (this.b=="ns" && this.v==4)
        this.ns5 = (this.b=="ns" && this.v==5)
        this.ie = (this.b=="ie" && this.v>=4)
        this.ie4 = (this.version.indexOf('MSIE 4')>0)
        this.ie5 = (this.version.indexOf('MSIE 5')>0)
        this.ie6 = (this.version.indexOf('MSIE 6')>0)
        this.mac = (this.hrw.indexOf('mac')>-1)
        this.win = (this.ns||this.ie)
}

var bw = new checkBrowser();
var bw_str = (bw.ie?"ie_":bw.ns4?"ns4_":"ns_") + bw.hrw + ".css";