Accessing javascript variable in jsp in java -
i have included javascript file in head of jsp file! want there variable increasing using click on map, , want value in jsp page. please tell me how that, here code!
the jsp file code! incremental value defined clickhandler.js
<%@ page language="java" contenttype="text/html; charset=iso-8859-1" pageencoding="iso-8859-1"%> <!doctype html public "-//w3c//dtd html 4.01 transitional//en" "http://www.w3.org/tr/html4/loose.dtd"> <html> <head> <meta http-equiv="content-type" content="text/html; charset=iso-8859-1"> <title>insert title here</title> <script src="http://www.openlayers.org/api/openlayers.js"></script> <script src="clickhandler.js" type="text/javascript"> </script> </head> <h1>this login page</h1> <body onload='init();'> <form action="hellowelcome" method="post"> <input type="text" name="username"> <input type="text" name="surname"> <input type="submit" value="submit"> <div id="map" style="height: 650px" ></div> </form> </body> </html> here clickhandler.js file code!
var i=0; var map,vectorlayer, selectedfeature; var lat=33.7167; var lon=73.0667; var zoom=10; var map; var curpos = new array(); var position; var fromprojection = new openlayers.projection("epsg:4326"); // transform wgs 1984 var toprojection = new openlayers.projection("epsg:900913"); // spherical mercator projection var cntrposition = new openlayers.lonlat(lon, lat).transform( fromprojection, toprojection); function init() { map = new openlayers.map("map",{ controls: [ new openlayers.control.panzoombar(), new openlayers.control.layerswitcher({}), new openlayers.control.permalink(), new openlayers.control.mouseposition({}), new openlayers.control.scaleline(), new openlayers.control.overviewmap(), ] } ); var mapnik = new openlayers.layer.osm("map"); map.addlayers([mapnik]); //map.addlayer(mapnik); map.setcenter(cntrposition, zoom); //markers.addmarker(new openlayers.marker(cntrposition)); var click = new openlayers.control.click(); map.addcontrol(click); click.activate(); }; openlayers.control.click = openlayers.class(openlayers.control, { defaulthandleroptions: { 'single': true, 'double': false, 'pixeltolerance': 0, 'stopsingle': false, 'stopdouble': false }, initialize: function(options) { this.handleroptions = openlayers.util.extend( {}, this.defaulthandleroptions ); openlayers.control.prototype.initialize.apply( this, arguments ); this.handler = new openlayers.handler.click( this, { 'click': this.trigger }, this.handleroptions ); }, trigger: function(e) { var lonlat = map.getlonlatfrompixel(e.xy); lonlat1= new openlayers.lonlat(lonlat.lon,lonlat.lat).transform(toprojection,fromprojection); var long_value=lonlat1.lon; var lat_value=lonlat1.lat; //action="" i=i+1; alert("ur coordinates ..."+i+" "+long_value + " " +lat_value); //<a href="login.jsp"><a> //<link href="login.jsp" > } });