if(document.images){
imgClient_off=new Image();imgClient_off.src="images/portnav_client_off.gif";
imgClient_on=new Image();imgClient_on.src="images/portnav_client_on.gif";
imgCMS_off=new Image();imgCMS_off.src="images/portnav_cms_off.gif";
imgCMS_on=new Image();imgCMS_on.src="images/portnav_cms_on.gif";
imgCPanel_off=new Image();imgCPanel_off.src="images/portnav_cpanel_off.gif";
imgCPanel_on=new Image();imgCPanel_on.src="images/portnav_cpanel_on.gif";
imgWebmail_off=new Image();imgWebmail_off.src="images/portnav_webmail_off.gif";
imgWebmail_on=new Image();imgWebmail_on.src="images/portnav_webmail_on.gif";
}
function imgOff(ImageName){if(document.images!=null){document[ImageName].src=eval(ImageName+"_off.src");}}
function imgOn(ImageName){if(document.images!=null){document[ImageName].src=eval(ImageName+"_on.src");}}