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hydronics_home_on = new Image();
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hydronics_home_off = new Image();
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sterling_hvac_contactus_on = new Image();
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sterling_hvac_contactus_off = new Image();
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heat_news_on = new Image();
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heat_news_off = new Image();
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heating_links_on = new Image();
  heating_links_on.src = "../images/heating_links_on.gif";
heating_links_off = new Image();
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commercial_hydronics_on = new Image();
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commercial_hydronics_off = new Image();
  commercial_hydronics_off.src = "../images/commercial_hydronics_off.gif";
residential_heat_on = new Image();
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residential_heat_off = new Image();
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baseboard_salesreps_on = new Image();
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baseboard_salesreps_off = new Image();
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hot_water_lit_on = new Image();
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hot_water_lit_off = new Image();
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steam_heat_why_on = new Image();
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steam_heat_why_off = new Image();
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fintube_on = new Image();
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fintube_off = new Image();
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terminal_units_on = new Image();
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terminal_units_off = new Image();
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radiant_heating_on = new Image();
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radiant_heating_off = new Image();
  radiant_heating_off.src = "../images/radiant_heating_off.gif";

cabinet_unit_on = new Image();
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cabinet_unit_off = new Image();
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convectors_on = new Image();
  convectors_on.src = "../images/convectors_on.gif";
convectors_off = new Image();
  convectors_off.src = "../images/convectors_off.gif";
steam_hot_water_on = new Image();
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steam_hot_water_off = new Image();
  steam_hot_water_off.src = "../images/steam_hot_water_off.gif";
}

function on(nameon) {
if (document.images) 
document[nameon].src = eval(nameon + "_on.src");
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function off(nameoff) {
if (document.images)
document[nameoff].src = eval(nameoff + "_off.src");
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// --> end script hide