var nVer = navigator.appVersion;
var nAgt = navigator.userAgent;
var browserName  = navigator.appName;
var fullVersion  = ''+parseFloat(navigator.appVersion); 
var majorVersion = parseInt(navigator.appVersion,10);
var nameOffset,verOffset,ix;

//alert(nAgt)
//alert(nAgt.indexOf("MSIE 60"))

// In MSIE, the true version is after "MSIE" in userAgent
if ((verOffset=nAgt.indexOf("MSIE"))!=-1) {
 browserName = "ie";
 fullVersion = nAgt.substring(verOffset+5);
}
// In Opera, the true version is after "Opera" 
else if ((verOffset=nAgt.indexOf("Opera"))!=-1) {
 browserName = "op";
 fullVersion = nAgt.substring(verOffset+6);
}
// In Chrome, the true version is after "Chrome" 
else if ((verOffset=nAgt.indexOf("Chrome"))!=-1) {
 browserName = "ch";
 fullVersion = nAgt.substring(verOffset+7);
}
// In Safari, the true version is after "Safari" 
else if ((verOffset=nAgt.indexOf("Safari"))!=-1) {
 browserName = "sa";
 fullVersion = nAgt.substring(verOffset+7);
}
// In Firefox, the true version is after "Firefox" 
else if ((verOffset=nAgt.indexOf("Firefox"))!=-1) {
 browserName = "ff";
 fullVersion = nAgt.substring(verOffset+8);
}
// In most other browsers, "name/version" is at the end of userAgent 
else if ( (nameOffset=nAgt.lastIndexOf(' ')+1) < (verOffset=nAgt.lastIndexOf('/')) ) 
{
 browserName = nAgt.substring(nameOffset,verOffset);
 fullVersion = nAgt.substring(verOffset+1);
 if (browserName.toLowerCase()==browserName.toUpperCase()) {
  browserName = navigator.appName;
 }
}
// trim the fullVersion string at semicolon/space if present
if ((ix=fullVersion.indexOf(";"))!=-1) fullVersion=fullVersion.substring(0,ix);
if ((ix=fullVersion.indexOf(" "))!=-1) fullVersion=fullVersion.substring(0,ix);

majorVersion = parseInt(''+fullVersion,10);
if (isNaN(majorVersion)) {
 fullVersion  = ''+parseFloat(navigator.appVersion); 
 majorVersion = parseInt(navigator.appVersion,10);
}


imgHeight = screen.availHeight;
if(browserName == 'ff'){
imgHeight = imgHeight -208;

imgGalleryTop = (imgHeight-516)+29;
}
else if(browserName == 'ie' && majorVersion==6){
imgHeight = imgHeight -179;
imgGalleryTop = 29;
}
else if(browserName == 'ie' && majorVersion==7){
imgHeight = imgHeight -193;
imgGalleryTop = 29;
}
else if(browserName == 'ie' && majorVersion==8){
imgHeight = imgHeight -218;
imgGalleryTop = 29;
}
else if(browserName == 'op'){
imgHeight = imgHeight -154;
imgGalleryTop = 29;
}
else if(browserName == 'sa'){
imgHeight = imgHeight -133;
imgGalleryTop = 29;
}
else if(browserName == 'ch'){
imgHeight = imgHeight -107;
imgGalleryTop = 29;
}
// JavaScript Document