if (document.images) {
 home_out = new Image(); home_out.src="./button11.jpg";
 home_over  = new Image(); home_over.src  ="./button12.jpg";

 viagra_out = new Image(); viagra_out.src="./button49.jpg";
 viagra_over  = new Image(); viagra_over.src  ="./button4A.jpg";
 
 cialis_out = new Image();  cialis_out.src="./button4C.jpg";
 cialis_over  = new Image(); cialis_over.src  ="./button4D.jpg";
 
 levitra_out = new Image(); levitra_out.src="./button4F.jpg";
 levitra_over  = new Image(); levitra_over.src  ="./button50.jpg";

 tadalis_out = new Image(); tadalis_out.src="./button52.jpg";
 tadalis_over  = new Image(); tadalis_over.src  ="./button53.jpg";

 kamagra_out = new Image(); kamagra_out.src="./button55.jpg";
 kamagra_over  = new Image(); kamagra_over.src  ="./button56.jpg";

}

function NButton(btName) {
 if (document.images)
  eval('document.'+btName+'.src='+btName+'_out.src');
}

function OButton(btName) {
 if (document.images)
  eval('document.'+btName+'.src='+btName+'_over.src');
}