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

JSONscriptRequest.scriptCounter = 1;

JSONscriptRequest.prototype.buildScriptTag = function(){
	this.scriptObj = document.createElement("script");
	this.scriptObj.setAttribute("type", "text/javascript");
	this.scriptObj.setAttribute("src", this.fullUrl + this.noCacheIE);
	this.scriptObj.setAttribute("id", this.scriptId);
}

JSONscriptRequest.prototype.removeScriptTag = function(){
	this.headLoc.removeChild(this.scriptObj);
}

JSONscriptRequest.prototype.addScriptTag = function(){
	this.headLoc.appendChild(this.scriptObj);
}
  
function addScript(url){
	var obj=new JSONscriptRequest(url);     
	obj.buildScriptTag();
	obj.addScriptTag();
}