if (document.images) {

	img1on = new Image();           
	img1on.src = "images/btn_home_2.gif";  
	img2on = new Image();           
	img2on.src = "images/btn_aboutus_2.gif";  
	img3on = new Image();           
	img3on.src = "images/btn_services_2.gif";  
	img4on = new Image();           
	img4on.src = "images/btn_project_2.gif";
	img5on = new Image();           
	img5on.src = "images/btn_references_2.gif";
	img6on = new Image();           
	img6on.src = "images/btn_testimonials_2.gif"; 
	img7on = new Image();           
	img7on.src = "images/btn_suppliers_2.gif";
	img8on = new Image();           
	img8on.src = "images/btn_employment_2.gif";
	img9on = new Image();           
	img9on.src = "images/btn_contactus_2.gif";     
	 
	img1off = new Image();          
	img1off.src = "images/btn_home_1.gif"; 
	img2off = new Image();          
	img2off.src = "images/btn_aboutus_1.gif"; 
	img3off = new Image();          
	img3off.src = "images/btn_services_1.gif"; 
	img4off = new Image();          
	img4off.src = "images/btn_project_1.gif"; 
	img5off = new Image();          
	img5off.src = "images/btn_references_1.gif";
	img6off = new Image();          
	img6off.src = "images/btn_testimonials_1.gif"; 
	img7off = new Image();          
	img7off.src = "images/btn_suppliers_1.gif";
	img8off = new Image();          
	img8off.src = "images/btn_employment_1.gif";
	img9off = new Image();          
	img9off.src = "images/btn_contactus_1.gif";  

}
function imgOn(imgName) {
	if (document.images) {
    	document[imgName].src = eval(imgName + "on.src");
    }
}

function imgOff(imgName) {
	if (document.images) {
		document[imgName].src = eval(imgName + "off.src");
	}
}
function smallWindow(myurl,iheight,iwidth) {
	var iMyWidth;
	var iMyHeight;
	var mywindow = null;
	
	
	if (!mywindow || mywindow.closed){
		iMyWidth = (window.screen.width/2) - ((iwidth/2) + 10); //half the screen width minus half the new window width (plus 5 pixel borders).
		iMyHeight = (window.screen.height/2) - ((iheight/2) + 50); //half the screen height minus half the new window height (plus title and status bars).
		mywindow=open(myurl,"myname","height="+ iheight +",width="+ iwidth +",left=" + iMyWidth + ",top=" + iMyHeight + ",screenX=" + iMyWidth + ",screenY=" + iMyHeight + ",scrollbars=no, statusbar=no");
		mywindow.location.href = myurl;
		mywindow.focus()
    }else{
    	mywindow.focus()
	}
}