if (document.layers) { 
layerRef=".layers[";
styleRef="]";
eind = "]";
}
else if (document.all) { 
layerRef=".all[";
styleRef="].style";
eind = "]";
}
else if (document.getElementById) { 
layerRef=".getElementById(";
styleRef=").style";
eind = ")";
}
		

function wissel(blok) 
{
	if (blok==1) {
		eval ("document"+layerRef+"'knop1'"+eind+".src='images/home2010_1_aan.gif'");
	}else if (blok==2) {
		eval ("document"+layerRef+"'knop2'"+eind+".src='images/home2010_2_aan.gif'");
	}else if (blok==3) {
		eval ("document"+layerRef+"'knop3'"+eind+".src='images/home2010_3_aan.gif'");
	}else if (blok==4) {
		eval ("document"+layerRef+"'knop4'"+eind+".src='images/home2010_4_aan.gif'");
	}else if (blok==5) {
		eval ("document"+layerRef+"'knop5'"+eind+".src='images/home2010_5_aan.gif'");
	}else if (blok==6) {
		eval ("document"+layerRef+"'knop6'"+eind+".src='images/home2010_6_aan.gif'");
	}	
}   
function wisselweg(blok) 
{
	if (blok==1) {
		eval ("document"+layerRef+"'knop1'"+eind+".src='images/home2010_1_uit.gif'");
	}else if (blok==2) {
		eval ("document"+layerRef+"'knop2'"+eind+".src='images/home2010_2_uit.gif'");
	}else if (blok==3) {
		eval ("document"+layerRef+"'knop3'"+eind+".src='images/home2010_3_uit.gif'");
	}else if (blok==4) {
		eval ("document"+layerRef+"'knop4'"+eind+".src='images/home2010_4_uit.gif'");
	}else if (blok==5) {
		eval ("document"+layerRef+"'knop5'"+eind+".src='images/home2010_5_uit.gif'");
	}else if (blok==6) {
		eval ("document"+layerRef+"'knop6'"+eind+".src='images/home2010_6_uit.gif'");
	}
}