dynamic javaScript insertion

function JSONscriptRequest(fullUrl) {

this.fullUrl = fullUrl;

this.headLoc = document.getElementsByTagName("head").item(0);

};

JSONscriptRequest.prototype.buildScriptTag = function () {

this.scriptObj = document.createElement("script");

this.scriptObj.setAttribute("type", "text/javascript");

this.scriptObj.setAttribute("src", this.fullUrl);

};

JSONscriptRequest.prototype.removeScriptTag = function () {

this.headLoc.removeChild(this.scriptObj);

};

JSONscriptRequest.prototype.addScriptTag = function () {

this.headLoc.appendChild(this.scriptObj);

};

var JSONscript = new JSONscriptRequest(req);

JSONscript.buildScriptTag();

JSONscript.addScriptTag();