function nw_img(arg){
	if(document.images){
		rslt=new Image();
		rslt.src=arg;
		return rslt;
	}
}
function change_img_src(){
	for(var i=0;i<change_img_src.arguments.length;i+=2){
		document[change_img_src.arguments[i]].src=change_img_src.arguments[i+1];
	}
}
function change_cursor_pointer(id){
	document.all[id].style.cursor='pointer';
}
function change_cursor_default(id){
	document.all[id].style.cursor='default';
}
var ie = (navigator.appName.toLowerCase().indexOf('explorer') != -1);
var ns = (navigator.appName.toLowerCase().indexOf('netscape') != -1);
function get_inside_width(){
	if(ns) return window.innerWidth
	else return document.body.clientWidth
}
var window_top;
var window_left;
var new_window;
function window_open(page,name,width,height){
	window_left=eval("(screen.availWidth-"+width+")/2-15");
	window_top=eval("(screen.availHeight-"+height+")/2-20");
	new_window=window.open(page,name,'width='+width+',height='+height+',top='+window_top+',left='+window_left+',toolbar=0,resizable=1,scrollbars=1,status=1');
	new_window.focus();
}
function window_open_with_tools(page,name,width,height){
	window_left=eval("(screen.availWidth-"+width+")/2-15");
	window_top=eval("(screen.availHeight-"+height+")/2-20");
	new_window=window.open(page,name,'width='+width+',height='+height+',top='+window_top+',left='+window_left+',toolbar=1,resizable=1,scrollbars=1,status=1');
	new_window.focus();
}