var iExt = 'gif';
var suffix = new Array('on', 'off');
var iPath = '/images/buttons/';

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;
}

function preLoad_buttons(){
	preLoad('att', 'alltel', 'boost', 'tmobile', 'cellularone', 'dobson', 'nextel', 'sprint', 'verizon','other');
}