JavaScript±à³Ì±Ê¼Ç
ÐÂÖÐ……
1¡¢Êý¾ÝÀàÐÍÑéÖ¤ÎÊÌâ
Asp.NetËäÈ»ÓÐÑéÖ¤¿Ø¼þ£¬µ«ÊÇÓÐЩ¸´ÔÓµÄÑéÖ¤»¹Êǵô«µ½·þÎñÆ÷ÉϽøÐУ¬ÓÃjsËٶȺÍÐÔÄܶ¼±È½ÏºÃ
<script>
//¼ì²éÊÇ·ñΪÈÎÒâÊý£¨ÊµÊý£©
function isNumeric(strNumber) {
var newPar=/^(-|\+)?\d+(\.\d+)?$/
alert(newPar.test(strNumber)); }
//¼ì²éÊÇ·ñΪÕýÊý
function isUnsignedNumeric(strNumber) {
var newPar=/^\d+(\.\d+)?$/
alert(newPar.test(strNumber)); }
//¼ì²éÊÇ·ñΪÕûÊý
function isInteger(strInteger) {
var newPar=/^(-|\+)?\d+$/
alert(newPar.test(strInteger)); }
//¼ì²éÊÇ·ñΪÕýÕûÊý
function isUnsignedInteger(strInteger) {
var newPar=/^\d+$/
alert(newPar.test(strInteger)); }
</script>
2¡¢asp.netÖÐÓÃalert£¨£©ÊµÏÖ»»ÐÐÎÊÌâ
asp.netÖÐÓÃresponse.Write("<script>alert('Ìáʾ£º\n²Ù×÷³ö´í£¡');</script>");ÎÞ·¨Ö´ÐС£
½«×Ö·û´®Ð´³É
say="Ìáʾ£º\\n²Ù×÷³ö´í£¡"
say=@"Ìáʾ£º\n²Ù×÷³ö´í£¡"
3¡¢jsʵÏÖË¢ÐÂÑéÖ¤Âë
µ¥»÷ͼƬˢУº
<img id="CheckImg" src="CreatImage.aspx" onclick="this.src='CreatImage.aspx?temp='+Math.random()"/>
µ¥»÷“Ë¢ÐÂÑéÖ¤Âë”°´Å¥Ë¢ÐÂ
function imagechick()
{
form1.CheckImg.src="CreatImage.aspx?temp="+Math.random();
return false;//²»ÉÏ´«µ½·þÎñÆ÷
}
ÆäÖÐCreatImage.aspxΪ²úÉúÑéÖ¤ÂëͼƬµÄÒ³Ãæ£¬Ô´Âë¼û£ºC#²úÉúͼÐÎÑéÖ¤Âë
4¡¢jsÖÐʹÓÃÕýÔò±í´ïʽµÄ·½·¨
¸ñʽÊÇ£º/ÕýÔò±í´ïʽ/
±ØÐëÓÃÁ½¸öб¸Ü°ÑÕýÔò±í´ïʽÀ¨ÆðÀ´¡£
Èç·Ç·¨×Ö·û¼ì²âÕýÔò±í´ïʽΪ£º^(?:[\u4e00-\u9fa5]*\w*\s*)+$
ʹÓõĴúÂëΪ£º
var newPar=/^(?:[\u4e00-\u9fa5]*\w*\s*)+$/;
if(newPar.test("1234&1238*_~"))
{
&
Ïà¹ØÎĵµ£º
Conditionals Ìõ¼þ±í´ïʽ
Similar in nature to loops, conditionals determine how execution flows through JavaScript. The traditional argument of whether to use if-else statements or a switch statement applies to JavaScript just as it does to other languages. Since different b ......
Yielding with Timers Óö¨Ê±Æ÷Èóöʱ¼äƬ
Despite your best efforts, there will be times when a JavaScript task cannot be completed in 100 milliseconds or less because of its complexity. In these cases, it's ideal to yield control of the UI thread so that UI updates may occur ......
µÚ¾ÅÕÂ
Building and Deploying High-Performance JavaScript Applications
´´½¨²¢²¿Êð¸ßÐÔÄÜJavaScriptÓ¦ÓóÌÐò
According to a 2007 study by Yahoo!'s Exceptional Performance team, 40%–60% of Yahoo!'s users have an empty cache experience, and about 20% of all page views are done ......
Working Around Caching Issues ¹ØÓÚ»º´æÎÊÌâ
Adequate cache control can really enhance the user experience, but it has a downside: when revving up your application, you want to make sure your users get the latest version of the static content. This is accomplished by renaming ......
ÐÂÖÐ……
1¡¢Êý¾ÝÀàÐÍÑéÖ¤ÎÊÌâ
Asp.NetËäÈ»ÓÐÑéÖ¤¿Ø¼þ£¬µ«ÊÇÓÐЩ¸´ÔÓµÄÑéÖ¤»¹Êǵô«µ½·þÎñÆ÷ÉϽøÐУ¬ÓÃjsËٶȺÍÐÔÄܶ¼±È½ÏºÃ
<script>
//¼ì²éÊÇ·ñΪÈÎÒâÊý£¨ÊµÊý£©
function isNumeric(strNumber) {
var newPar=/^(-|\+)?\d+(\.\d+)?$/
alert(newPar.test(strNumber)); }
//¼ ......