JavaScriptÏÞÖÆtextarea³¤¶È
ÓÉÓÚTEXTAREAûÓÐmaxlength,²»ÄÜÕâÑùÏÞÖÆtextarea³¤¶È£¬ µ«Í¨¹ýJAVASCRIPT ¾ÍÄÜʵÏÖµ½
<mce:script type="text/javascript"><!--
function limitLength(obj, length) {
var desc = obj.value;
obj.value = substr(obj.value,length);
}
function substr(str,length){
var l=0,i=0;
while(l <length && i<str.length){
l+=1;
if(str.substring(i,i+1).match(/[\u4e00-\u9fa5]/))l+=2;//Ò»¸öÖÐÎÄÊÇÏ൱ÓÚ3¸öÓ¢ÎÄ
i+=1;
}
return str.substring(0,i);
}
// --></mce:script>
<textarea name="blogdesc" cols="50" rows="5" onkeyup="limitLength(this,200)">»Ð»Ðã±ã±»Ð»Ðã±ã±»Ð»Ðã±ã±ºÍ
ÊDz»ÊǺܼòµ¥£¿
Ïà¹ØÎĵµ£º
ʵÀýÈçÏ£ºjavascript.htmlÎļþ
<html>
<head>
<title>JavaScriptÑéÖ¤</title>
</head>
<script language='JavaScript'>
......
Ò»£¬JavaScriptÖеı£Áô¹Ø¼ü×Ö
abstract extends instanceof static & ......
/*¼ì²éÊÇ·ñÑ¡Öи´Ñ¡¿ò2010Äê3ÔÂ6ÈÕ10:36:48*/
function checkSelect(id, msg){
var checks = $(id).getElementsByTagName("input");
var flag=false;
if(checks.length!=null){
for(var i=0;i<checks.length;i++){
if(checks[i].type=="checkbox" && checks[i].checked= ......
һ˵µ½javascript¾ÍÓÐÈË»áÏëµ½java£¬µ«ÊÇËûÃÇÍê»áÊÇÁ½»ØÊ£¬javascriptÊÇÃæÏò¶ÔÏóµÄ¶¯Ì¬ÀàÐ͵ÄÇø·Ö´óСдµÄ¿Í»§¶Ë½Å±¾ÓïÑÔ£¬Çë×¢Òâ´óСÓÐÇø±ð£¬ÃæÏò¶ÔÏó¡£javascriptÓÃ;ºÜ¶àµÄ£¬Ä¿Ç°¼¸ºõËùÓÐÖ÷Á÷ä¯ÀÀÆ÷¶¼Ö§³Ö¡£µ«ÊÇËûÓÐÒ»¸ö»µ´¦¾ÍÊDZäÁ¿£¬Èçvar
i=4;Õâ¸öi¾ÍÊÇintÀàÐ͵ģ¬var
s="hello",Õâ¸ösÊÇ×Ö·û´®ÀàÐ͵ģ ......
javascriptº¯ÊýµÄ¶¨Òå
1£ºµ÷Óùؼü×ÖfunctionÀ´¹¹Ô죬È磺
function distance(x1,x2,y1,y2)
{
var dx=x2-x1;
var dy=y2-y1;
return Math ......