1.用戶名密碼不為空檢查：
function?btnsubmit_onclick()?
 {?
????var?userid? = ?document.userInfoFormBean.userId.value;?
????var?password? = ?document.userInfoFormBean.pwd.value;?
???? if (userid.indexOf( " ' " ) !=- 1 || password.indexOf( " ' " ) !=- 1 ) {
????????alert( " 用戶名、密碼中包含非法字符 " );
???????? return ? false ;
????}
???? if ?(userid == "" ? || ?password == "" ?)??
???? {?
????????window.alert( " 用戶編碼、密碼不能為空！ " );
????????document.userInfoFormBean.userId.focus();
????????document.userInfoFormBean.pwd.focus();
???????? return ? false ;
????} ?
???? else {???????????????????
????????document.userInfoFormBean.action = " /mms/doLoginAction.do " ;
???????? return ? true ;
????} ?
}

2.顯示今天日期：
? < script >
????????????????????????????todayDate? = ? new ?Date();
????????????????????????????date? = ?todayDate.getDate();
????????????????????????????month = ?todayDate.getMonth()? + 1 ;
????????????????????????????year = ?todayDate.getYear();
????????????????????????????document.write( " 您好！??今天是 " )
????????????????????????????document.write( " &nbsp;&nbsp; " )
???????????????????????????? if (navigator.appName? == ? " Netscape " )
???????????????????????????? {
????????????????????????????????document.write( 1900 + year);
????????????????????????????????document.write( " 年 " );
????????????????????????????????document.write(month);
????????????????????????????????document.write( " 月 " );
????????????????????????????????document.write(date);
????????????????????????????????document.write( " 日 " );
????????????????????????????}
???????????????????????????? if (navigator.appVersion.indexOf( " MSIE " )? != ? - 1 )
???????????????????????????? {
????????????????????????????document.write(year);
????????????????????????????document.write( " 年 " );
????????????????????????????document.write(month);
????????????????????????????document.write( " 月 " );
????????????????????????????document.write(date);
????????????????????????????document.write( " 日 " );
????????????????????????????document.write( " &nbsp;&nbsp; " )
????????????????????????????}
???????????????????????????? if ?(todayDate.getDay()? == ? 5 )?document.write( " 星期五 " )
???????????????????????????? if ?(todayDate.getDay()? == ? 6 )?document.write( " 星期六 " )
???????????????????????????? if ?(todayDate.getDay()? == ? 0 )?document.write( " 星期日 " )
???????????????????????????? if ?(todayDate.getDay()? == ? 1 )?document.write( " 星期一 " )
???????????????????????????? if ?(todayDate.getDay()? == ? 2 )?document.write( " 星期二 " )
???????????????????????????? if ?(todayDate.getDay()? == ? 3 )?document.write( " 星期三 " )
???????????????????????????? if ?(todayDate.getDay()? == ? 4 )?document.write( " 星期四 " )
???????????????????????????? </ script > ?

???????????? 下面是一路上有你兄弟那看到的咚咚，比我的好像更牛點

<span?id="aa">當前時間</span><script>setInterval("aa.innerHTML=new?Date().toLocaleString()+'?星期'+'日一二三四五六'.charAt(new?Date().getDay());",1000);
</script>?

3.Html擁有JSP 的request.getParmerter("")功能（轉自--一路有你）


HTML也可以通過JS來到得參數,函數如下(我將它保存到了一個數組里面):


//--------------------------------------------------------------------------
//Name:?GetArgsFromHref
//
//Pupers:?the?function?will?get?the?parameters?from?the?server
//
//Parameter:
//sHref---->>the?current?URL
//sArgName---->>the?Array?store?the?name?of?parameters?which?you?want?to?get
//
//Return:?Array?to?store?the?result
//
//Author:?Jkallen
//----------------------------------------------------------------------------
function?GetArgsFromHref(sHref,?sArgName)
{
????var?args??=?sHref.split("?");
????var?p_Result?=?new?Array();
????
????if(args[0]?==?sHref)?
????{
?????????return?p_Result;?
????}??
????var?str?=?args[1];
????args?=?str.split("&");
????for(var?i?=?0;?i?<?args.length;?i?++)
????{
????????str?=?args[i];
????????var?arg?=?str.split("=");
????????if(arg.length?<=?1)?
????????????continue;
????????if(sArgName?!=?null)
????????{
????????????for(var?c1?=?0;?c1?<?sArgName.length;?c1++)
????????????{
????????????????var?tempValue?=?arg[0];
????????????????if(?tempValue?==?sArgName[c1])
????????????????????p_Result[tempValue]?=?arg[1];
????????????}???
????????}//end?if
?????}//end?for
?????
?????return?p_Result;
?}//end?GetArgsFromHref
4.控制對象的顯示和隱藏



?頁面中的DIV：
?????? < DIV?ID = " ds1 " ?CLASS = " submenu " ?STYLE = " display:none " > ?
　　 < BR >< A?HREF = "url1 " ?target = " _blank " > XXXX </ A > ?
???????? < br >
　　 < BR >< A?HREF = " url2 " ?target = " _blank " > XXXX2 </ A > ?
　　 < BR > 　?
?? </ DIV >


控制DIV顯示和隱藏的函數
< SCRIPT > ?
?????????? var?cm = null ;?
??????????? document.onclick? = ? new ?Function( " show(null) " )??
???????????? function?getPos(el,sProp)??
 {var?iPos? = ? 0 ?
???????????????? while?(el!=null)??
{iPos+=el["offset"?+?sProp]?
???????????????????????????? el?=?el.offsetParent}?
????????????????????????? return?iPos} ??
function?show(el,m)??
 { if ?(m)? {m.style.display = '' ;??
??????????????????? m.style.pixelLeft? = ?getPos(el, " Left " )?
??????????????????? m.style.pixelTop? = ?getPos(el, " Top " )? + ?el.offsetHeight} ??
??????????? if?((m!=cm)?&&?(cm))?
???????????????????????? cm.style.display='none';
????????????????????????? cm=m;
}? ??
????????? function getIEPosX(elt) { return getIEPos(elt,"Left"); }
?????????function getIEPosY(elt) { return getIEPos(elt,"Top"); }
???????? function getIEPos(elt,which) {
????????????????????? iPos = 0
??????????????????? ?while (elt!=null) {
??????????????????? ?iPos += elt["offset" + which]
?????????????????? ?elt = elt.offsetParent
???????????? }
?
當在頁面里添加：
<td?align="left"?valign="top"?ID="d1"?onmouseover="show(this,ds1);"><img?src="images/sheng_14.gif"?name="Image107"?width="151"?height="24"?border="0"></td>