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");}}

if (document.images)
{
imgk1on=new Image(); imgk1on.src="img/snav_a-d_over.gif";
imgk1off=new Image(); imgk1off.src="img/snav_a-d_off.gif";

imgk2on=new Image(); imgk2on.src="img/snav_e-h_over.gif";
imgk2off=new Image(); imgk2off.src="img/snav_e-h_off.gif";

imgk3on=new Image(); imgk3on.src="img/snav_i-m_over.gif";
imgk3off=new Image(); imgk3off.src="img/snav_i-m_off.gif";

imgk4on=new Image(); imgk4on.src="img/snav_n-s_over.gif";
imgk4off=new Image(); imgk4off.src="img/snav_n-s_off.gif";

imgk5on=new Image(); imgk5on.src="img/snav_t-z_over.gif";
imgk5off=new Image(); imgk5off.src="img/snav_t-z_off.gif";

imgk6on=new Image(); imgk6on.src="img/snav_viewall_over.gif";
imgk6off=new Image(); imgk6off.src="img/snav_viewall_off.gif";


}