function addSize(){
	var myWidth = document.documentElement.clientWidth;
	var imgWidth = 400;
	var imgHeight = 200;
	var imgNewHeight = 200;
	if(myWidth<(imgWidth-10)){
		imgNewHeight = imgWidth-(imgWidth-myWidth);
		imgNewHeight = imgNewHeight/imgWidth;
		imgNewHeight = parseInt(imgHeight*imgNewHeight);
		imgWidth = myWidth-5;
	}
	document.getElementById("forex_charts").href = "forex_charts/"+imgWidth+"/"+imgNewHeight+"/";
}