// mainimg, pullbtn
$(document).ready(function(){
	baseWid = 960;
	//mainimg
	function resizeMainimg() {
		winWid = $(window).width();
		winWid<baseWid ? winWid = baseWid : null;
		$("div#mainimg").css("width", winWid);
	}
	$(window).bind("resize", resizeMainimg);
	// pullbtn
	function resizePullbtn() {
		winWid = $(window).width();
		thisWid = $("div#slidedown ul.btn").width();
		if(winWid<baseWid) {
			leftPos = baseWid/2 + (baseWid/2-thisWid);
		} else {
			leftPos = (baseWid+winWid)/2 - thisWid;
		}
		$("div#slidedown ul.btn").css("margin-left", leftPos);
	}
	resizePullbtn();
	$(window).bind("resize", resizePullbtn);
});