function checkBrowser(){

	this.ver=navigator.appVersion

	this.dom=document.getElementById?1:0

	this.ie5=(this.ver.indexOf("MSIE 5")>-1 && this.dom)?1:0;

	this.ie4=(document.all && !this.dom)?1:0;

	this.ns5=(this.dom && parseInt(this.ver) >= 5) ?1:0;

	this.ns4=(document.layers && !this.dom)?1:0;

	this.bw=(this.ie5 || this.ie4 || this.ns4 || this.ns5)

	return this

}
bw=new checkBrowser()
function showhide(div,nest){

	obj=bw.dom?document.getElementById(div).style:bw.ie4?document.all[div].style:bw.ns4?nest?document[nest].document[div]:document[div]:0; 

	if(obj.display=='block' || obj.display=='block') obj.display='none'

	else obj.display='block'

}
function show(div,nest){

	obj=bw.dom?document.getElementById(div).style:bw.ie4?document.all[div].style:bw.ns4?nest?document[nest].document[div]:document[div]:0; 

	obj.display='block'

}
function hide(div,nest){

	obj=bw.dom?document.getElementById(div).style:bw.ie4?document.all[div].style:bw.ns4?nest?document[nest].document[div]:document[div]:0; 

	obj.display='none'

}