preload (new Array("opred","oprede","prod","prode","contact","contacte","investe","potreb"));

function preload(images)
{
        for (i =0;i<images.length;i++)
           {
img = images[i];
eval(img+"_on = new Image(172,26);\n"+img+"_on.src='/images/"+img+"_on.gif';\n");
eval(img+"_off = new Image(172,26);\n"+img+"_off.src='/images/"+img+"_off.gif';\n");
           }
}

function graphON(graphName)
{
 document.images[graphName].src=eval(graphName + "_on.src");
}

function graphOFF(graphName)
{
 document.images[graphName].src=eval(graphName + "_off.src");
}