if(document.images){

		_dent_on=new Image();
		_dent_on.src="images/left-dent-l.gif";
		
		_dent_off=new Image();
		_dent_off.src="images/left-dent.gif";

		_phar_on=new Image();
		_phar_on.src="images/left-phar-l.gif";
		
		_phar_off=new Image();
		_phar_off.src="images/left-phar.gif";		
		
		_ltc_on=new Image();
		_ltc_on.src="images/left-ltc-l.gif";
		
		_ltc_off=new Image();
		_ltc_off.src="images/left-ltc.gif";		

		_add_on=new Image();
		_add_on.src="images/left-add-l.gif";
		
		_add_off=new Image();
		_add_off.src="images/left-add.gif";		

		_sign_on=new Image();
		_sign_on.src="images/left-sign-up-l.gif";
		
		_sign_off=new Image();
		_sign_off.src="images/left-sign-up.gif";		
		}
		
		function img_act(imgName) {
		             {
					 if (document.images) { 
		             imgOn = eval(imgName + "on.src");
		             document [imgName].src = imgOn;}
		             }
		     }
		
		function img_inact(imgName) {
		             {
					if (document.images) { 
		             imgOff = eval(imgName + "off.src");
		             document [imgName].src = imgOff;}
		             }
		    }