function trim(str) {
	return str.replace(/^\s*/,'').replace(/\s*$/,'');
}


pic = new Array()
for(i=0;i<6;i++)
{
pic[i] = new Image();
if(i==0) pic[i].src = "images/main_on.gif";
if(i==1) pic[i].src = "images/katalog_on.gif";
if(i==2) pic[i].src = "images/gallery_on.gif";
if(i==3) pic[i].src = "images/kalkulator_on.gif";
if(i==4) pic[i].src = "images/knowmore_on.gif";
if(i==5) pic[i].src = "images/about_on.gif";
}



function ChgImg(ImNm, Pic){
	if (document.images) {
    document.images[ImNm].src = "images/"+ Pic + ".gif";}
	return true;
	}


<!-- для фотогалереи //-->

var resId=0;
var imgWndw;
function imgOpen(imgLink,Title) {
  if (typeof(window.resizeBy)=='undefined') return true;
  imgWndw=window.open('',imgLink.target,'width=100,height=100'+ ',toolbar=no,menubar=no,location=no,status=no,'+ 'resizable=yes,scrollbars=no,left='+(screen.width>>>2)+ ',top='+(screen.height>>>4));
  self.focus();
  var imgTitle=(Title)?Title:imgLink.href;
  with (imgWndw.document){
    open();
    write('<ht'+'ml><he'+'ad><ti'+'tle>'+imgTitle+'</ti'+'tle>'+ '</he'+'ad><bo'+'dy leftmargin="0" topmargin="0" '+ 'rightmargin="0" bottommargin="0" marginwidth="0" '+ 'style="margin:0;padding:0;position:fixed;overflow:none;" '+ 'marginheight="0"><img src="'+imgLink.href+'" border="0" '+ ' alt="'+imgTitle+'" title="'+imgTitle+'" class="r" /></bo'+ 'dy></ht'+'ml>');
    close();
  }
  resId=setInterval('imgResize()',100);
  return false;
}

function imgResize() {
  var w=imgWndw.document.images[0].width;
  if (w>screen.availWidth) w=screen.availWidth;
  var h=imgWndw.document.images[0].height;
  if (h>screen.availHeight) h=screen.availHeight;
  if (w>50 && h>50) {
    var ww=(imgWndw.innerWidth)?imgWndw.innerWidth:((document.body)? imgWndw.document.body.clientWidth:null);
    var wh=(imgWndw.innerHeight)?imgWndw.innerHeight:((document.body)? imgWndw.document.body.clientHeight:null);
    if (ww && wh) { imgWndw.resizeBy(w-ww,h-wh); }
    imgWndw.focus();
    clearInterval(resId)
  }
	return true;
}