a.linkClass1 {
	    background:url(../images/home2.jpg) top left no-repeat;
	    float:left;
	    height:44px;
	    text-indent:-10000px;
	    position:relative;
	    cursor:pointer;
	    width:121px;
	    
	    }
	    

	a.linkClass2 { background:url(../images/about2.jpg) top left no-repeat;
	    	float:left;
	        height:44px;
	        text-indent:-10000px;
	        position:relative;
	        cursor:pointer;
	        width:121px;
	        
	        }
	        
	
		a.linkClass3 {
	    background:url(../images/research2.jpg) top left no-repeat;
	    float:left;
	    height:44px;
	    text-indent:-10000px;
	    position:relative;
	    cursor:pointer;
	    width:121px;
	    }
	    
	    
	    a.linkClass4 {
	    background:url(../images/hormone2.jpg) top left no-repeat;
	    float:left;
	    height:44px;
	    text-indent:-10000px;
	    position:relative;
	    cursor:pointer;
	    width:121px;
	    }
	    
	    
	    	a.linkClass5 {
	    background:url(../images/contact2.jpg) top left no-repeat;
	    float:left;
	    height:44px;
	    text-indent:-10000px;
	    position:relative;
	    cursor:pointer;
	    width:123px;
	    }
		
			a.linkClass6 {
	    background:url(../images/newsletters2.jpg) top left no-repeat;
	    float:left;
	    height:44px;
	    text-indent:-10000px;
	    position:relative;
	    cursor:pointer;
	    width:123px;
	    }
	    
	
	
	
	a:hover 
	{
	    background-position:left bottom;
	   
	    }
	        
	a.open {background-position:left bottom !important;
	     
	    
	    }