var num = 0;
if(num && num == 0){
alert(true);
}else{
alert(false);
}
緇撴灉鏄細 false;if(num && num == 0){
alert(true);
}else{
alert(false);
}
涓轟粈涔堝憿錛?br /> JavaScript 鏉冨▉鎸囧崡涓婅錛屽鏋滀竴涓竷灝斿肩敤鍦ㄦ暟鍊肩幆澧冧腑錛宼rue灝辮漿鎹負鏁板瓧1,鑰宖alse 灝辮漿鎹負鏁板瓧0.濡傛灉涓涓竷灝斿肩敤鍦ㄤ竴涓瓧絎︿覆鐜涓紝true灝辮漿鎹負瀛楃涓?"true" ,鑰?false 灝辮漿鎹負瀛楃涓?"false".
鐩稿弽錛屽鏋滄垜浠妸涓涓暟鍊肩被鍨嬬殑0鐢ㄥ湪甯冨皵鐜涓紝閭ｄ箞0灝嗚漿鎹粈涔堝憿錛?
JavaScript 涓殑甯冨皵綾誨瀷鍊肩殑鐢ㄦ硶璺烠涓殑甯冨皵綾誨瀷鍊肩殑鐢ㄦ硶鏇寸浉鎷燂紝鑰屼笉鏄拰JAVA鐩告嫙銆?img src ="http://m.tkk7.com/gen-sky/aggbug/304487.html" width = "1" height = "1" />
]]>
/**
* 榪欎竴璇兘澶熸湁鏁堝湴灝?nbsp;object娣誨姞鍒頒綔鐢ㄥ煙閾劇殑
* 澶?nbsp;閮紝鐒跺悗鎵ц statement,鍐嶆妸浣滅敤鍩熼摼澶嶅埌鍘熷鐘舵併?br /> */
with(object)
statement
渚嬪錛?/strong>* 榪欎竴璇兘澶熸湁鏁堝湴灝?nbsp;object娣誨姞鍒頒綔鐢ㄥ煙閾劇殑
* 澶?nbsp;閮紝鐒跺悗鎵ц statement,鍐嶆妸浣滅敤鍩熼摼澶嶅埌鍘熷鐘舵併?br /> */
with(object)
statement
鍦ㄥ疄闄呭簲鐢ㄤ腑錛屼嬌鐢?with璇彞鍙互鍑忓皯澶ч噺鐨勮緭鍏ャ?br />
frames[1].document.forms[0].address.value = '';
frames[1].document.forms[0].name.value = '';
frames[1].document.forms[0].email.value = '';
絳夊悓濡備笅錛?
frames[1].document.forms[0].name.value = '';
frames[1].document.forms[0].email.value = '';
with(frames[1].document.forms[0]){
// Access form elements directly here.For example;
name.value = '';
address.value = '';
email.value = ''
}
浣跨敤 with 璇彞錛屼唬鐮侀毦浠ヤ紭鍖栵紝榪愯閫熷害鎱紝緙栫爜涔犳儻鐩告姷瑙︼紝鍥犱負寤鴻浠ヤ笅鏂規硶杈撳叆錛?br />
// Access form elements directly here.For example;
name.value = '';
address.value = '';
email.value = ''
}
var form = frames[1].document.forms[0];
form.name.value = '';
form.address.value = '';
form.email.value = '';
form.name.value = '';
form.address.value = '';
form.email.value = '';
]]>