js总结

/* iframe 自适应高度  */
function dyniframesize(down) {
	var pTar = null;
	if (document.getElementById) {
		pTar = document.getElementById(down);
	} else {
		eval('pTar = ' + down + ';');
	}
	if (pTar && !window.opera) {
		//begin resizing iframe 
		pTar.style.display = "block";
		if (pTar.contentDocument && pTar.contentDocument.body.offsetHeight) {
			//ns6 syntax 
			pTar.height = pTar.contentDocument.body.offsetHeight + 20;
			pTar.width = pTar.contentDocument.body.scrollWidth + 20;
		} else if (pTar.Document && pTar.Document.body.scrollHeight) {
			//ie5+ syntax 
			pTar.height = pTar.Document.body.scrollHeight;
			pTar.width = pTar.Document.body.scrollWidth;
		}
	}
}
动态显示div
$(document).ready(function(){
	  //添加
	  $(".add").click(function(){
	  $(".tip").fadeIn(200);});
	  
	  $(".tiptop a").click(function(){
	  $(".tip").fadeOut(200);});
	  $(".sure").click(function(){
	  $(".tip").fadeOut(100);});
	  $(".cancel").click(function(){
	  $(".tip").fadeOut(100);});
	
});
 倒计时：
function countDown(time,day_elem,hour_elem,minute_elem,second_elem){
	//if(typeof end_time == "string")
	var end_time = new Date(time).getTime(),//月份是实际月份-1
	//current_time = new Date().getTime(),
	sys_second = (end_time-new Date().getTime())/1000;
	var timer = setInterval(function(){
		if (sys_second > 0) {
			sys_second -= 1;
			var day = Math.floor((sys_second / 3600) / 24);
			var hour = Math.floor((sys_second / 3600) % 24);
			var minute = Math.floor((sys_second / 60) % 60);
			var second = Math.floor(sys_second % 60);
			day_elem && $(day_elem).text(day);//计算天
			$(hour_elem).text(hour<10?"0"+hour:hour);//计算小时
			$(minute_elem).text(minute<10?"0"+minute:minute);//计算分
			$(second_elem).text(second<10?"0"+second:second);// 计算秒
		} else { 
			clearInterval(timer);
		}
	}, 1000);
}
document.getElementById('myframe').contentWindow.location.reload(true);//刷新iframe