Ò׽ؽØÍ¼Èí¼þ¡¢µ¥Îļþ¡¢Ãâ°²×°¡¢´¿ÂÌÉ«¡¢½ö160KB

javascriptÊ®½øÖÆ×ª¶þ½øÖÆ£¬¶þ½øÖÆ×ªÊ®½øÖÆ


alert(parseInt("101101", 2))

ÔËÐдúÂë

function toBin(intNum) {
var answer = "";
if(/\d+/.test(intNum)) {
while(intNum != 0) {
answer = Math.abs(intNum%2)+answer;
intNum = parseInt(intNum/2);
}
if(answer.length == 0)
answer = "0";
return answer;
} else {
return 0;
}
}
alert(toBin(45))

ÔËÐдúÂë

function toBin(dec) {
var bits = [];
var dividend = dec;
var remainder = 0;
while (dividend >= 2) {
remainder = dividend % 2;
bits.push(remainder);
dividend = (dividend - remainder) / 2;
}
bits.push(dividend);
bits.reverse();
return bits.join("");
}
alert(toBin(45))

ÔËÐдúÂë


Ïà¹ØÎĵµ£º

JavaScript Google IG Drag Demo

 Ð§¹ûÑÝʾµØÖ·£ºhttp://www.phzzy.org/code/drag/google_drag.html
ÍÏ×§Ô­Àí£º
¹ØÓÚÍÏ×§µÄ»ù´¡£¬¿ÉÒԲο¼ÕâÆªÎÄÕ£¬½²µÃ·Ç³£²»´í¡£
http://www.sohotx.com/mzk/index.php/1007/ArticleContent/298.html
ÆäʵԭÀíºÜ¼òµ¥£¬¾ÍÊǰѰó¶¨Èý¸öʼþ£ºonmousedown , onmousemove , onmouseup¡£
ÔÚÊó±êµãÏÂʱ(onmousedown)° ......

¶ÔJavaScriptµÄһЩÈÏʶ

¶ÔÓÚJavaScriptÀ´½²£¬ËüµÄ³öÏÖʹµÃÐÅÏ¢ºÍÓû§Ö®¼ä²»½öÖ»ÊÇÒ»ÖÖÏÔʾºÍä¯ÀÀµÄ¹ØÏµ£¬¶øÊÇʵÏÖÁËÒ»ÖÖʵʱµÄ¡¢¶¯Ì¬µÄ¡¢¿É½»Ê½µÄ±í´ïÄÜÁ¦¡£×î½üС±àÕûÀíÁËһЩ×ÊÁÏ£¬·¢²¼ÉÏÀ´Óë´ó¼ÒÒ»Æð·ÖÏí£¬Èç¹ûÎÄÕÂÓÐʲô覴û¹Ï£Íû¸ßÊÖÖ¸µã£¬´ó¼ÒÏ໥ѧϰ¡£
JavaScriptÊÇÒ»ÖÖ»ùÓÚ¶ÔÏó(Object)ºÍʼþÇý¶¯(Event Driven)²¢¾ßÓа²È«ÐÔÄܵĽű¾Óï ......

JavaScript×Ö·û´®º¯Êý

 JS×Ô´øº¯Êý
concat
½«Á½¸ö»ò¶à¸ö×Ö·ûµÄÎı¾×éºÏÆðÀ´£¬·µ»ØÒ»¸öеÄ×Ö·û´®¡£
var a = "hello";
var b = ",world";
var c = a.concat(b);
alert(c);
//c = "hello,world"
indexOf
·µ»Ø×Ö·û´®ÖÐÒ»¸ö×Ó´®µÚÒ»´¦³öÏÖµÄË÷Òý£¨´Ó×óµ½ÓÒËÑË÷£©¡£Èç¹ûûÓÐÆ¥ÅäÏ·µ»Ø -1 ¡£
var index1 = a.indexOf("l");
//index1 ......

ie firefox javascript

 1.document.formName.item("itemName") ÎÊÌâ
˵Ã÷:IEÏÂ,¿ÉÒÔʹÓÃdocument.formName.item("itemName")»ò document.formName.elements["elementName"];FirefoxÏÂ,Ö»ÄÜʹÓà document.formName.elements["elementName"].
½â¾ö·½·¨:ͳһʹÓÃdocument.formName.elements["elementName"].
2.¼¯ºÏÀà¶ÔÏóÎÊÌâ
˵Ã÷:IEÏÂ,¿É ......
© 2009 ej38.com All Rights Reserved. ¹ØÓÚE½¡ÍøÁªÏµÎÒÃÇ | Õ¾µãµØÍ¼ | ¸ÓICP±¸09004571ºÅ