javascriptËÄÉáÎåÈëµÄÎÊÌâ
Çó 555.555µÄËÄÉáÎåÈë±£ÁôÁ½Î»Ð¡Êý
ʹÓÃMath.round Ôõô¶¼Ëã²»¶Ô,½á¹û¶¼ÊÇ555.55 ,Ã²ËÆÊÇÒòΪjava¼ÆË㸡µãÊýʱ»áĪÃûÆäÃîÔÚ½áβ¸úÉÏÒ»´®Êý×Ö ±ÈÈç555.55500000003
ÎÞÄÎÖ»ÄÜдÕâ¸ö·½·¨
function round(a,b){
var s=a.toString().indexOf(".");
a0=a.toString().substr(0,s+b+1);
a1=Math.round(a.toString().substr(s+b+1,1)*0.1)*Math.pow(10,-b);
return(a0*1+a1);
}
function fix(v,n){
var s =''+v;
var flag=false;
if(s.substring(0,1)=='0'){
s='1'+s;
flag=true;
alert(1);
}
var i =(s).indexOf('.');
if (s.length-i-1>n){
s=s.substring(0,s.length-(s.length-i-2-n));
var j =''+ Math.floor((s.replace('.','')/10+0.5));
j=j.substring(0,i)+'.'+j.substring(i,j.length);
if(flag){
return j.substring(1,j.length);
}else{
return j;
}
}else{
return s;
}
}
»ù±¾ÉÏ¿ÉÒÔÓÃ=.=
Ïà¹ØÎĵµ£º
¸ø Java SE ×¢Èë½Å±¾ÓïÑԵĻîÁ¦
Mustang µÄ½Å±¾ÓïÑÔÐÂÌØÐÔ
ÎĵµÑ¡Ïî
½«´ËÒ³×÷Ϊµç×ÓÓʼþ·¢ËÍ
½«´ËÒ³×÷Ϊµç×ÓÓʼþ·¢ËÍ
¼¶±ð£º Öм¶
Îâ 玥ò« (wuyuehao@cn.ibm.com), Èí¼þ¹¤³Ìʦ, IBM
2006 Äê 10 ÔÂ 30 ÈÕ
ÔÚ¼´½«·¢²¼µÄ Java SE6£¨Mustang£©ÖУ¬Ôö¼ÓÁ˶Խű¾ÓïÑÔµÄÖ§³Ö¡£Í¨¹ý¶Ô½Å± ......
ÔÎÄ£º¡¶Speeding up JavaScript: Working with the DOM¡·
×÷Õߣº KeeKim Heng, Google Web Developer
ÔÚÎÒÃÇ¿ª·¢»¥ÁªÍø¸»Ó¦Óã¨RIA£©Ê±£¬ÎÒÃǾ³£Ð´Ò»Ð©javascript½Å±¾À´Ð޸ĻòÕßÔö¼ÓÒ³ÃæÔªËØ£¬ÕâЩ¹¤×÷×îÖÕÊÇDOM——»òÕß˵Îĵµ¶ÔÏóÄ£ÐÍ——À´Íê³ÉµÄ£¬¶øÎÒÃǵÄʵÏÖ·½Ê½»áÓ°Ïìµ½Ó¦ÓõÄÏìÓ¦ËÙ¶È¡£
DO ......
10¸öÓÅÐãµÄAjaxºÍJavascript¹úÍâ×ÊÔ´ÍøÕ¾
×ªÔØµØÖ·£ºhttp://www.zzsky.cn/build/content/1246.htm
1¡¢Ajax Rain: http://www.ajaxrain.com
¡¡¡¡AjaxRainÓкܶàÍêÃÀÕûºÏAjax¡¢CSS¡¢DHTML»òJavascriptµÄʵÀý£¬ÓÐһЩDemoµÄÈ·ÖµµÃÄãÈ¥¿´Ò»¿´£¬¼´Ê¹Äã²»ÊÇÍøÒ³Éè¼Æ£¨¿ª·¢£©Ê¦¡ ......
Ò»¡¢½éÉÜÓëFlash¶¯»¿ØÖÆÓйصÄjavascriptº¯Êý£º
º¯ÊýÃû ʹÓà &n ......
JavaScript¶¯Ì¬Ìí¼Óɾ³ý±í¸ñÐÐ(Ö§³ÖFireFox)
2006-08-16 12:47
¡¡¡¡Ð§¹ûͼÈçÏ£º
¡¡¡¡µã“Ìí¼Ó²ÎÓëÈË”°´Å¥¿ÉÒÔÌí¼ÓÒ»ÐУ¬Ã¿ÐкóÃæ¶¼ÓÐÒ»¸öɾ³ý°´Å¥£¬¿ÉÒÔɾ³ýËùÔÚÐУ¬“Çå¿Õ”Ôòɾ³ýËùÓеÄÐС£
¡¡¡¡ÕâÖÖЧ¹ûÔÚÐèÒªÅúÁ¿Ìí¼ÓÊý¾ÝµÄʱºò·Ç³£ÓÐÓ㬿ÉÒÔÔÚ¿Í»§¶ËÌí¼ÓÍêÒ»ÅúÊý¾Ý£¬È»ºóͨ¹ýAJAXÒ»´ÎÌá½ ......