function imgLinkage(imgId, loru, upload_type, subjectId){
	
	var ajaxRequest;  // The variable that makes Ajax possible!
	
	try{
		// Opera 8.0+, Firefox, Safari
		ajaxRequest = new XMLHttpRequest();
	} catch (e){
		// Internet Explorer Browsers
		try{
			ajaxRequest = new ActiveXObject("Msxml2.XMLHTTP");
		} catch (e) {
			try{
				ajaxRequest = new ActiveXObject("Microsoft.XMLHTTP");
			} catch (e){
				// Something went wrong
				alert("Your browser broke!");
				return false;
			}
		}
	}
	// Create a function that will receive data sent from the server
	ajaxRequest.onreadystatechange = function(){
		if(ajaxRequest.readyState == 4){
			
			var results = ajaxRequest.responseText;
			var results_array = results.split("###RESPONSE###");
			
			//linkage
			document.getElementById('img'+imgId).innerHTML = results_array[0];
			//warning
			if (results_array[1]!=undefined) {
				document.getElementById('maxWarning').innerHTML = results_array[1];
			}
			else {
				document.getElementById('maxWarning').innerHTML = ' ';
			}

			//var ajaxDisplay = document.getElementById('img'+imgId);
			//ajaxDisplay.innerHTML = ajaxRequest.responseText;
			
		}
	}
	ajaxRequest.open("GET", "content/imgLinkage.php?loru=" + loru + "&imgid=" + imgId + "&type=" + upload_type + "&subject_id=" + subjectId , true);
	ajaxRequest.send(null); 	
}