function showHeaderImage(){
 switch( Math.round(Math.random() * 4) ) {
	
	case 0:
	document.write("<img border=0 align=right hspace=0 src=images/1c.jpg>")
	break
	
	case 1:
	document.write("<img border=0 align=right hspace=0 src=images/2c.jpg>")
	break
	
	case 2:
	document.write("<img border=0 align=right hspace=0 src=images/3c.jpg>")
	break
	
		
	case 3:
	document.write("<img border=0 align=right hspace=0 src=images/4c.jpg>")
	break
			
	case 4:
	document.write("<img border=0 align=right hspace=0 src=images/5c.jpg>")
	break
	
	default:
	break
	}
}