var iversion = -1;
	var roll=false;
	function version() {
	  if (iversion != -1) return roll;
	  if (navigator.appName.indexOf("Netscape") != -1) { // Netscape
	    if (navigator.userAgent.indexOf("Mozilla/") != -1)
	      iversion = parseFloat(navigator.appVersion)
	      else
	      iversion = 1;
	    roll = (iversion>=3);
	  } else {  // Not netscape.
	    if (navigator.appName.indexOf("Internet Explorer") != -1) {
	    if (navigator.userAgent.indexOf("Mozilla/") != -1)
	      iversion = parseFloat(navigator.appVersion)
	      else
	      iversion = 1;
	    } else {
	      iversion = 1;
	    }
	    roll = (iversion>3);
	  }
	  return roll;
	}

	function chimgmeta(pic,name,pic2,name2) {
	  if (roll) {
	    pic.src = name.src;
	    pic2.src = name2.src;
	  }
	}
	function chimg(pic,name) {
	  if (roll) {
	    pic.src = name.src;
	  }
	}
	function getScreenHeight() {
		height = 500
		if (typeof document.body != 'undefined') {
			height = document.body.clientHeight
		}
		if (typeof window.innerHeight != 'undefined') {
			height = window.innerHeight
		}
		height = (height > 0) ? height : 500
		return height
	}

	function getScreenWidth() {
		width = 750
		if (typeof document.body != 'undefined') {
			width = document.body.clientWidth
		}
		if (typeof window.innerWidth != 'undefined') {
			width = window.innerWidth
		}
		width = (width > 0) ? width : 500
		return width
	}