function init_coverstory(){
	
		if (document.images){ 
			image1_on = new Image; image1_on.src = 'images/coverstory/prj_management/multi-screen-thumb-on.jpg';
			image1_off = new Image; image1_off.src = 'images/coverstory/prj_management/multi-screen-thumb-off.jpg';
		
			image2_on = new Image; image2_on.src = 'images/coverstory/training/scada-lab-thumb-on.jpg';
			image2_off = new Image; image2_off.src = 'images/coverstory/training/scada-lab-thumb-off.jpg';
			
			image3_on = new Image; image3_on.src = 'images/coverstory/engineering/manifolds-thumb-on.jpg';
			image3_off = new Image; image3_off.src = 'images/coverstory/engineering/manifolds-thumb-off.jpg';
			
			
		} else {
			image1_on = new Image; image1_on = '';
			image1_off = new Image; image1_off ='';
			
			image2_on = new Image; image2_on = '';
			image2_off = new Image; image2_off = '';
			
			image3_on = new Image; image3_on = '';
			image3_off = new Image; image3_off = '';
			
		}
		
	}
	
	function img_mouse_over(m){
		if (document.images){
			//eval('document.rollover'+m+'.src=image'+m+'_on.src');
			eval('document.images["rollover'+m+'"].src=image'+m+'_on.src');
			
		}
		
	}
	
	function img_mouse_out(m){
		if (document.images){
			//eval('document.rollover'+m+'.src=image'+m+'_off.src');
			eval('document.images["rollover'+m+'"].src=image'+m+'_off.src');

		}		
		
	}