function JSONscriptRequest(fullUrl) {

    this.fullUrl = fullUrl; 
    this.noCacheIE = '&noCacheIE=' + (new Date()).getTime();
    this.headLoc = document.getElementsByTagName("head").item(0);
    this.scriptId = 'JscriptId' + JSONscriptRequest.scriptCounter++;
}

JSONscriptRequest.scriptCounter = 1;
JSONscriptRequest.prototype.buildScriptTag = function () {

    this.scriptObj = document.createElement("script");
    this.scriptObj.setAttribute("type", "text/javascript");
    this.scriptObj.setAttribute("charset", "utf-8");
    this.scriptObj.setAttribute("src", this.fullUrl + this.noCacheIE);
    this.scriptObj.setAttribute("id", this.scriptId);
}

JSONscriptRequest.prototype.removeScriptTag = function () {
    // Destroy the script tag
    try{
        this.headLoc.removeChild(this.scriptObj);
	}catch(err){
        // avoid error in browser
	}
}

JSONscriptRequest.prototype.addScriptTag = function () {
    // Create the script tag
    this.headLoc.appendChild(this.scriptObj);
}