var default_interval = 5000;
var image_name = "bmpbw.bmp";
var f_StamImg = new Image();

function ReplaceImage(f_NewImg) {
	 var f_Img = document.getElementById('imgData');

	 if (f_NewImg == "")
	 {
	 		f_NewImg = image_name + ".";
	 } else {
	 		f_NewImg += "?" + (new Date()).getTime();
	 }

	 if (f_Img){
	 	f_Img.src = f_NewImg;
	 }
}

function checkKey(e) {
    e = e || window.event;
    
    switch (e.keyCode) {
    	case 13: 
    		ImgClick (e,0);
    		break;
    	case 27:
    		ImgClick (e,5);
    		break;
    	case 37:
        case 112:
    		ImgClick (e,1);
    		break;
    	case 38:
        case 114:
    		ImgClick (e,3);
    		break;
    	case 39:
        case 113:
    		ImgClick (e,2);
    		break;
    	case 40:
        case 115:
    		ImgClick (e,4);
    		break;
    }
}

function Init(f_Interval) {
    
 if (/fast$/.test(window.location.href)){
    default_interval = 1500;
 }
 if (/color$/.test(window.location.href)){
    image_name = "screen.png";
    ReplaceImage(image_name);
 }
 
 if (f_Interval == null)  {
   setInterval ('ReplaceImage(image_name);',default_interval);
 } else {
   setInterval ('ReplaceImage(image_name);',f_Interval);
 }

 document.onkeydown = checkKey;
}

function ImgClick (ev,index) {
	var sndStr = "key.htm?";

	if (index>9) {
		sndStr += "L=" + (index-10) ;
	}else{
		if (ev.ctrlKey || ev.altKey || ev.shiftKey) {
			sndStr += "f=" + index ;
		} else {
			sndStr += "F=" + index ;
		}
	}
	sndStr += "." + (new Date()).getTime();

	if (window.XMLHttpRequest) { // Mozilla, Safari,...
		xmlhttp = new XMLHttpRequest();
	} else if (window.ActiveXObject) { // IE
		xmlhttp = new ActiveXObject("Microsoft.XMLHTTP");
	}

    xmlhttp.open("GET", sndStr);
    xmlhttp.onreadystatechange = function() {
    }

    xmlhttp.send(null);
	setTimeout ('ReplaceImage(image_name)',500);
}