var nCurrHomeMainItem=1, oHomeMainTimer;
function fChangeHomeMainItem(num){
	clearTimeout(oHomeMainTimer);
	if(num>3) num=1;
	$("#oHomeMainItemBtn"+nCurrHomeMainItem+" img").attr("src","/images/homemain_"+nCurrHomeMainItem+"off.gif");
	$("#oHomeMainItem"+ nCurrHomeMainItem).stop().fadeOut(400,function(){$("#oHomeMainItem"+ num).fadeIn(400)});
	$("#oHomeMainItemBtn"+num+" img").attr("src","/images/homemain_"+num+"on.gif");
	nCurrHomeMainItem=num;
	oHomeMainTimer=setTimeout(function(){fChangeHomeMainItem(nCurrHomeMainItem+1)},10000);
}

$(document).ready(function(){
	$("#oHomeMainItem1").fadeIn(400);
	$("#oHomeMainItemBtn1 img").attr("src","/images/homemain_1on.gif");
	oHomeMainTimer=setTimeout(function(){fChangeHomeMainItem(2)},10000);
});

var bGraphTextVisiable=false
function fChangeGraphText(){
	var $obj1=$(".clsCalcGraph")
	var $obj2=$(".clsCalcWhatsThis")
	if($obj1.css("display")=="block"){
		$obj1.fadeOut(200,function(){$obj2.fadeIn(200)});
		$("#oChangeGraphTextBtn").html("back");
		bGraphTextVisiable=true
	}
	else{
		$obj2.fadeOut(200,function(){$obj1.fadeIn(200)});
		$("#oChangeGraphTextBtn").html("what's this?");
		bGraphTextVisiable=false
	}
}

$.arrPreload=[]
$.arrPreload[0]="/images/calc_bar1.gif";
$.arrPreload[1]="/images/calc_bar2.gif";
$.arrPreload[2]="/images/calc_bar3.gif";
$.arrPreload[3]="/images/calc_bar4.gif";

$(document.createElement('img')).bind('load', function(){
		if($.arrPreload.length>0) this.src=$.arrPreload.shift();
}).trigger('load');

function fChangeGraphSpot(num){
	if(bGraphTextVisiable) fChangeGraphText();
	var nGraph1h=0, nGraph2h=0, sGraph1num="0", sGraph2num="0"
	switch(num){
		case 2: nGraph1h=40; nGraph2h=60; sGraph1num="$800*"; sGraph2num="$2,500*"; break;
		case 3: nGraph1h=50; nGraph2h=90; sGraph1num="$5,500*"; sGraph2num="$15,000*"; break;
		case 4: nGraph1h=60; nGraph2h=120; sGraph1num="$13,000*"; sGraph2num="$35,000*"; break;
		default: nGraph1h=28; nGraph2h=28; sGraph1num="0"; sGraph2num="0"; break;
	}
	$(".clsCalsBar").css("background-image","url(/images/calc_bar"+num+".gif)");
	$("#oGraph1").animate({height:nGraph1h},300);
	$("#oGraph1sum").html(sGraph1num);
	$("#oGraph2").animate({height:nGraph2h},300);
	$("#oGraph2sum").html(sGraph2num);
	
}