<!--

// define parameters

var pic_width=397;   //not required if the imgName is set correctly - inherits object parms
var pic_height=257;  //not required if the imgName is set correctly - inherits object parms
var pic_timer=8000;  //milliseconds - 8000 = 8 seconds
var numpics=8;
var thenum=0;
imgName="myImage";  //image object name from html page
                    //could pass this value, but javascript is already hardwired to page e.g. image files

// define images

if (document.images)  //does document support images
	{
	pic1= new Image(pic_width,pic_height);
	pic1.src="http://www.ars.usda.gov/sp2UserFiles/Place/66150000/pics/center_dropshadow00.jpg";  
	pic2= new Image(pic_width,pic_height); 
	pic2.src="http://www.ars.usda.gov/sp2UserFiles/Place/66150000/pics/center_dropshadow01.jpg"; 
	pic3= new Image(pic_width,pic_height);
	pic3.src="http://www.ars.usda.gov/sp2UserFiles/Place/66150000/pics/center_dropshadow02.jpg";  
	pic4= new Image(pic_width,pic_height);
	pic4.src="http://www.ars.usda.gov/sp2UserFiles/Place/66150000/pics/center_dropshadow03.jpg";  
	pic5= new Image(pic_width,pic_height);
	pic5.src="http://www.ars.usda.gov/sp2UserFiles/Place/66150000/pics/center_dropshadow04.jpg"; 
	pic6= new Image(pic_width,pic_height);
	pic6.src="http://www.ars.usda.gov/sp2UserFiles/Place/66150000/pics/center_dropshadow05.jpg";  
	pic7= new Image(pic_width,pic_height);
	pic7.src="http://www.ars.usda.gov/sp2UserFiles/Place/66150000/pics/center_dropshadow06.jpg";  
	pic8= new Image(pic_width,pic_height);
	pic8.src="http://www.ars.usda.gov/sp2UserFiles/Place/66150000/pics/center_dropshadow07.jpg"; 
 	}    

// define text for image captions
// text also defines alt property for images

var destext= new Array(8)
destext[0]="CMAVE two-story laboratory";
destext[1]="CMAVE administration and research facility";
destext[2]="CMAVE administration";
destext[3]="CMAVE two-story laboratory";
destext[4]="CMAVE laboratory";
destext[5]="Research greenhouses";
destext[6]="Research enclosure";
destext[7]="Research enclosure";

var pics= new Array(8) 
pics[0]=pic1.src;
pics[1]=pic2.src;
pics[2]=pic3.src;
pics[3]=pic4.src;
pics[4]=pic5.src; 
pics[5]=pic6.src;
pics[6]=pic7.src;
pics[7]=pic8.src;

function change_it()
{
	if (document.images)
		{
		document.getElementById(imgName).src=pics[thenum]
		document.getElementById(imgName).alt=destext[thenum]
		document.getElementById(imgName).width=pic_width
		document.getElementById(imgName).height=pic_height
		setTimeout('change_it2()',pic_timer);  
		}
}

function change_it2()
 {
         var x=0;
         thenum+=1;

           if (thenum>numpics-1)
             thenum=0;

           document.getElementById(imgName).src=pics[thenum];
	   document.getElementById(imgName).alt=destext[thenum];
           x+=1;
           setTimeout('change_it2()',pic_timer);
          
 }

//-->