var iPath	= '/images/text/';
var iExt 	= 'gif';
var suffix 	= new Array('on', 'off');
function preLoad(){
	if(document.images){
		var argLen = arguments.length;
		for(var i = 0; i < argLen; i++){
			var arg = arguments[i];
			var sufLen = suffix.length;
			for(j = 0; j < sufLen; j++){
				var suf = suffix[j];
				self[arg + '-' + suf] = new Image();
				self[arg + '-' + suf].src = iPath + arg + '-' + suf + '.' + iExt;
			}
		}
	}
}
function rollOver(iName, iState){
	if(document.images && self[iName + '-' + iState]){
		document.images[iName].src = self[iName + '-' + iState].src;
	}
	return true;
}