asp.net - How to set a img in my aspx page through javascript? -


maybe sounds stupid, can't figure out how set <img> code in .aspx page throught javascript.

my code far:

<%@ page language="vb" masterpagefile="~/masterpage.master" autoeventwireup="false" codefile="teste.aspx.vb"  inherits="teste" %>  <asp:content id="content1" contentplaceholderid="contentplaceholder1" runat="server">  latitude: <asp:textbox id="nr_latitudetextbox" runat="server" maxlength="12" /> <br /> longitude: <asp:textbox id="nr_longitudetextbox" runat="server" maxlength="12" /><br />  <asp:button id="cmb_mapa" runat="server" text="mapa" onclick="cmb_mapa_click"/><br />         <script language="javascript" type="text/javascript">                  function fonte(lat, lon) {                     var src = "http://maps.google.com/maps/api/staticmap?center=lat,lon&zoom=8&size=540x280&maptype=roadmap&sensor=false";                     testando("http://maps.google.com/maps/api/staticmap?center=lat,lon&zoom=8&size=540x280&maptype=roadmap&sensor=false", 540, 280, "mapa");                 }                  function testando(src, width, height, alt) {                     var img = document.createelement("img");                     img.src = src;                     img.width = width;                     img.height = height;                     img.alt = alt;                     document.body.appendchild(img);                 }         </script>      <div id="img">      </div>  </asp:content>

partial class:

partial class teste     inherits system.web.ui.page       protected sub cmb_mapa_click(byval sender object, byval e system.eventargs) handles cmb_mapa.click         page.clientscript.registerstartupscript(me.gettype(), "testando", "testando(" & nr_latitudetextbox.text & "," & nr_longitudetextbox.text & ");", true)     end sub end class

testando first parameter image url , you're not providing it.

it seems want call fonte , not testando on registerstartupscript. that's method takes latitude , longitude parameters.

edit

change 

var src = "http://maps.google.com/maps/api/staticmap?center=lat,lon&zoom=8&size=540x280&ma‌​ptype=roadmap&sensor=false" testando("http://maps.google.com/maps/api/staticmap?center=lat,lon&zoom=8&size=540x280&maptype=roadmap&sensor=false", 540, 280, "mapa");

by

var src = "http://maps.google.com/maps/api/staticmap?center=" + lat + "," + lon + "&zoom=8&size=540x280&ma‌​ptype=roadmap&sensor=false"; testando(src, 540, 280, "mapa");

fixed 2 things:

1) weren't using lat , lon parameter map url fixed src building

2) added src parameter testeando since weren't using it


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