js出错总结
1 没有</script>
src="js" "./js" "../js"
2 dom对象与jquery对象(jquery对象其实是集合,每个对象都有innerHTML 即html())
$("#dd") != document.getElementById("dd")
$("#dd")[0]= document.getElementById("dd")
$("#dd") = $(document.getElementById("dd"))
v=$(v)[0]
下面的几种写法对的
$("#dd").html(); $("#dd")[0].innerHTML;$("#dd").eq(0)[0].innerHTML;$("#dd").get(0).innerHTML;
3 eval() string转换为正则表达式
4 改菜单栏
<body>
<script>changeTitleActive(5);</script>
<script type="text/javascript">
function changeTitleActive(_value){
for(var i=1;i<7;i++){
if(_value==i){
$("#title"+i).attr("class","dropdown active");
}else{
$("#title"+i).attr("class","dropdown");
}
}
}
</script>
5检查名字的唯一性
function checkIsHave(avalues){
document.getElementById("showPrompt").innerHTML="正在验证...";
document.getElementById("showPrompt").style.color="red";
checkIsOkPublic("ims_interviewer","username",avalues,"showPrompt");
}
jsp:
onblur="checkIsHave(this.value);"maxlength="15";
<font id="showPrompt" ></font>
6 var reg=/^[\w-]+(\.[\w-]+)*@[\w-]+(\.[\w-]+)+$/; if(!reg.test(usermail)){}
7var now = new Date();
now.setHours(0, 0, 0, 0);
console.log(now.getTime());