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funciton Isnull(){}
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<javascript>
//
function  Isnull()
{
//ÑéÖ¤Óû§ÊÇ·ñ´æÔÚ
var islog =" <%=geya() %>";

if(islog=="")
{
  alert("¸ÃÕ˺ſÉÒÔʹÓÃ");
}
else
{
  alert("¸ÄÕ˺ÅÓÐÈËʹÓã¬ÇëÖØÐÂÌîд");
}

}

</javascript>
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public string  geya()
{
    //˼·£º ÏÈ»ñÈ¡Îı¾¿òµÄÖµ£¬ÔÚÈ¥Êý¾Ý¿â²éѯ¸ÄÕ˺ÅÓÐÎÞ£¬ Èç¹ûûÓзµ»Ø""×Ö·û´®£¬Óзµ»Ø¸Ã×Ö·û´®.
}

ÊÇ´¥·¢ºǫ́.CSÎļþÄڵķ½·¨°É£¿£¿£¿

__doPostBack('','');

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ÊÇ´¥·¢ºǫ́.CSÎļþÄڵķ½·¨°É£¿£¿£¿

__doPostBack('','');

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C# code:

protected void Button1_Click(object sender, EventArgs e)
{
//ÕâÀï¼ÓÄãÒªµ÷Óõķ½·¨¾Í¿ÉÒÔÁË
}


JScript code:

function Isnull() {
document.getElementById(&


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ºǫ́ÓÐÒ»¸öº¯Êý protected string Fun1(int a, string b)

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