gImgArr = new Array();
gImgArr['back'] = new Image();
gImgArr['back'].background = 'url(/images/back_btn.gif)';
gImgArr['submit'] = new Image();
gImgArr['submit'].background = 'url(/images/submit_btn.gif)';

gImgArrOn = new Array();
gImgArrOn['back'] = new Image();
gImgArrOn['back'].background = 'url(/images/back_btn_on.gif)';
gImgArrOn['submit'] = new Image();
gImgArrOn['submit'].background = 'url(/images/submit_btn_on.gif)';

function changeBG(pImgId, pHighLight) {

	if (pHighLight)
	{
		document.getElementById(pImgId).style.background = gImgArrOn[pImgId].background;
	}
	else
	{
		document.getElementById(pImgId).style.background = gImgArr[pImgId].background;
	}
	
	return true;
}