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         string cbSelectOnClickJS = @"
            if(this.checked)
            {
                document.getElementById('" + hidSelected.ClientID + @"').value += ',' + this.value;
            }
            else
            {
                document.getElementById('" + hidSelected.ClientID + @"').value
                = document.getElementById('" + hidSelected.ClientID + @"').value
                .replace(',' + this.value,'');
            }";//else±íʾȥµô×îºóÒ»¸ö¶ººÅ
        checkBox.Attributes.Add("onclick", cbSelectOnClickJS);
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  string strIsSpecial = "";  //ÅжÏÊÇ·ñÌØÊâµÄÑ¡ÈË
                try
                {
                    strIsSpecial = dic["IsSpecial"];
                }
                catch (Exception e) { }


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    var myString = new String("Every good boy does fine.");
    var myString = "Every good boy does fine.";
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 //ÅжÏÊäÈëÄÚÈÝÊÇ·ñΪ¿Õ
function IsNull(){
var str = document.getElementById('str').value.trim();
if(str.length==0){
alert('¶Ô²»Æð£¬Îı¾¿ò²»ÄÜΪ¿Õ»òÕßΪ¿Õ¸ñ!');//Ç뽫“Îı¾¿ò”¸Ä³ÉÄãÐèÒªÑéÖ¤µÄÊôÐÔÃû³Æ!
}
}

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DHTML (JavaScript Dom ±à³ÌÒÕÊõ)

 DHTMLÊÇ""dynamic HTML"(¶¯Ì¬HTML)µÄ¼ò³Æ.ÑϸñµØËµ,DHTML²¢²»ÊÇÒ»Ïîµ¥Ò»µÄм¼Êõ,¶øÊÇHTML,CSSºÍJavaScriptÕâÈýÖÖ¼¼Êõ½áºÏµÄ²úÎï.
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 1. oncontextmenu="window.event.returnValue=false" ½«³¹µ×ÆÁ±ÎÊó±êÓÒ¼ü
<table border oncontextmenu=return(false)><td>no</table> ¿ÉÓÃÓÚTable
2. <body onselectstart="return false"> È¡Ïûѡȡ¡¢·ÀÖ¹¸´ÖÆ
3. onpaste="return false" ²»×¼Õ³Ìù
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