function lib_bwcheck(){ 
	this.ver=navigator.appVersion
	this.agent=navigator.userAgent
	this.dom=document.getElementById?1:0
	this.opera5=this.agent.indexOf("Opera 5")>-1
	this.opera6=this.agent.indexOf("Opera 6")>-1
	this.ie5=(this.ver.indexOf("MSIE 5")>-1 && this.dom && !this.opera5)?1:0; 
	this.ie6=(this.ver.indexOf("MSIE 6")>-1 && this.dom && !this.opera5)?1:0;
	this.ie4=(document.all && !this.dom && !this.opera5)?1:0;
	this.ie=this.ie4||this.ie5||this.ie6
	this.mac=this.agent.indexOf("Mac")>-1
	this.ns6=(this.dom && parseInt(this.ver) >= 5) ?1:0; 
	this.ns4=(document.layers && !this.dom)?1:0;
	this.bw=(this.ie6 || this.ie5 || this.ie4 || this.ns4 || this.ns6 || this.opera5 || this.opera6)
	return this
}
var bw=new lib_bwcheck()


// carica form personalizzati al browser
if (bw.ns4) 
	{
	style='<style type="text/css"><!--'
			+'input.text { font-family:  Verdana,Arial, Helvetica, sans-serif; font-size: 10px; color: #000000;} '
			+'input.button { font-family:  Verdana,Arial, Helvetica, sans-serif; font-size: 10px; color: #000000;}'
			+'--></style>'
	document.writeln(style);
	}
else
	{
	style='<style type="text/css"><!--'
			+'input.text { font-family:  Verdana,Arial, Helvetica, sans-serif; font-size: 10px; color: #000000; border-color: #666666 #D7D7D7 #D7D7D7 #666666; border-style: solid; border-top-width: 1px; border-right-width: 1px; border-bottom-width: 1px; border-left-width: 1px};'
			+'input.button { font-family:  Verdana,Arial, Helvetica, sans-serif; font-size: 10px; color: #000000; border-color:  #D7D7D7 #666666 #666666 #D7D7D7; border-style: solid; border-width: 1px;};'
			+'--></style>'
	document.writeln(style);
	}