function PreloadButtonImage(listsrcimg)
{
listsrcimg=listsrcimg.split(",");
listimg1=new Array();
listimg2=new Array();
for(jk=0;jk<listsrcimg.length;jk++)
								   {
								   listimg1[jk]=new Image();listimg2[jk]=new Image();
								   listimg1[jk].src="images/"+listsrcimg[jk];
								   listimg2[jk].src="images/on"+listsrcimg[jk];
								   }

}

PreloadButtonImage("home.gif,chisono.gif,contatti.gif,portfolio.gif,graframan3.gif");

document.write("<br><a href=\"index.html\"><img name='graframan3' onmouseout=\"UnHighlight(this)\" onmouseover=\"Highlight(this)\" border=0 src=\"images/graframan3.gif\"></a>");