function getWindowHeight()
{     
   var myWidth = 0, 
      myHeight = 0;
       
   if( typeof( window.innerWidth ) == 'number' ) 
   {         
     //Non-IE         
     myWidth = window.innerWidth;         
     myHeight = window.innerHeight;     
   } 
   else 
     if( document.documentElement && ( document.documentElement.clientWidth || document.documentElement.clientHeight ) ) 
     {  
        //IE 6+ in 'standards compliant mode'         
        myWidth = document.documentElement.clientWidth;         
        myHeight = document.documentElement.clientHeight;     
     } 
     else 
       if( document.body && ( document.body.clientWidth || document.body.clientHeight ) ) 
       { //IE 4 compatible         
         myWidth = document.body.clientWidth;         
         myHeight = document.body.clientHeight;     
       }     
   return myHeight; 
   // return [ myWidth, myHeight ]; 
}