function calc_width(id)
    {    	
    	var el1=document.getElementById(id); 
    	if(el1)
    	{  
    		if(screen.width < 1000) 	
    		{    			
    			el1.style.width=1000+'px';
    		}
    		else
    		{
    			el1.style.width=screen.width-22;    
    		}
    	}
    	
    	
    }