isamap = new Object();
isamap[0] = "_df"
isamap[1] = "_ov"
isamap[2] = "_ot"
isamap[3] = "_dn"

function isimgact(id, act, num)
{
//alert("2 - count = " + count + " - limit = " + limit);
	if(count > limit) 
	{
		if(document.images) {  // ensure browser can do JavaScript rollovers.
	//alert("test2 - isimages" + num + "." + id + isamap[act] + ".src");
			document.images[id].src = eval( "isimages" + num + "." + id + isamap[act] + ".src");
	//alert(id + " " + act + " " + num);
		}
	}
}

if (document.images) { // ensure browser can do JavaScript rollovers.
//alert("testing");
	isimages1 = new Object();
	isimages1.mainpic_df = new Image();
	isimages1.mainpic_df.src = "images/main3.jpg";
	
	isimages1.mainpic_ov = new Image();
	isimages1.mainpic_ov.src = "images/maintech.jpg";

		isimages2 = new Object();
		isimages2.mainpic_df = new Image();
		isimages2.mainpic_df.src = "images/main3.jpg";
		
		isimages2.mainpic_ov = new Image();
		isimages2.mainpic_ov.src = "images/mainport.jpg";

	isimages3 = new Object();
	isimages3.mainpic_df = new Image();
	isimages3.mainpic_df.src = "images/main3.jpg";
	
	isimages3.mainpic_ov = new Image();
	isimages3.mainpic_ov.src = "images/maingraph.jpg";

		isimages4 = new Object();
		isimages4.mainpic_df = new Image();
		isimages4.mainpic_df.src = "images/main3.jpg";
		
		isimages4.mainpic_ov = new Image();
		isimages4.mainpic_ov.src = "images/mainprint.jpg";




}