弹出窗口的方法

Response.Write("<script>alert('"+str+"');</script>");
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Response.Write("<script language='javascript'>");
Response.Write(" alert('"+str+"');");
Response.Write("</script>");
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Response.Write("<script language='javascript'>");
Response.Write(" alert(\""+ str+"\");");
Response.Write("</script>");
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Page.RegisterClientScriptBlock("check","<script language=javascript>"+salert+"</script>");
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Page.RegisterClientScriptBlock("check","<script language=javascript>"+salert+"</script>");
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Response.Write("<script>alert('"+str.Replace("'","\\'")+"');</script>");