function bw_check(){
	this.agent=navigator.userAgent;	
	this.dom=document.getElementById?1:0;
	this.opera7=((this.agent.toLowerCase().indexOf('opera 7')>-1)||(this.agent.toLowerCase().indexOf('opera/7')>-1));
	this.operaOld=this.opera&&!this.opera7;
	return this;
	}
bw=new bw_check();

function doAdvanced(name){
	if (bw.dom){
		l=document.getElementById(name);
		if (l.style.display=="none"){
			l.style.display="block";
			document.advmode.src=img2.src;
			}else{
			l.style.display="none";		
			document.advmode.src=img1.src;
			}
		}
	}