function mheight() {

	
	var a = getElementHeight('vmenu');
	var b = getElementHeight('header');
	var c = getElementHeight('contenth');
        var footer = getElementHeight('footer');
        var body = getElementHeight('body');
        var creal = getElementHeight('contentdiv');    

     var client = getElementHeight('totalheight'); 
         
     if ( body < client) { 
     var c2 = (client - (body - c)); 
     if ( c2 > c ) { var c = c2; }
     var cntnt = c + 'px';
     
     }
    
     else if ( body > client ) {
      if ( creal < c ) { 
      var cntnt_new = creal + 'px';
      document.getElementById('contenth').style.height = cntnt_new;
      }
      else {document.getElementById('contenth').style.height = cntnt;}
     }
   
   
     if ( (a + footer) > c ) {
       var content_new = (a + footer) + 'px';
       document.getElementById('contenth').style.height = content_new;	    
       }
     else if ( c > (a + footer) ) {
       var menu_new = (c - footer) + 'px';
        document.getElementById('vmenu').style.height = menu_new;	   
       }
   }
   
     function getElementHeight(Elem) {
		if(document.getElementById) {
			var elem = document.getElementById(Elem);
		} else if (document.all){
			var elem = document.all[Elem];
		}
		
		xPos = elem.offsetHeight;
		
		return xPos;
      }