rollover=false
		if (document.images) {
		rollover=true
		but1on=new Image(275,22); but1on.src="images/shared/residential_on.gif";
		but1off=new Image(275,22); but1off.src="images/shared/residential.gif";
		but2on=new Image(92,22); but2on.src="images/shared/commercial_on.gif";
		but2off=new Image(92,22); but2off.src="images/shared/commercial.gif";
		but3on=new Image(72,22); but3on.src="images/shared/about_us_on.gif";
		but3off=new Image(72,22); but3off.src="images/shared/about_us.gif";
		but4on=new Image(84,22); but4on.src="images/shared/contact_us_on.gif";
		but4off=new Image(84,22); but4off.src="images/shared/contact_us.gif";
		}
//