var nLimitFileSize = 204800;  //200KB
var cLimitFileExtension = "JPG;JPEG;GIF";
var cLimitFileExtensionAlert = "JPG, JPEG or GIF";
function ValidateImg(){	
	var dummy = document.getElementById("dummy");
	var attFile = document.getElementById("attFile");
	if (dummy==null) return;
	if (attFile==null) return;

	//dummy.src = attFile.value;
	//alert(dummy.fileSize );
	if(dummy.fileSize > nLimitFileSize){
			alert("File Size should not be bigger than 200KB. Please refresh the page and try again.");			
			//document.getElementById(tcFormID).reset();
			return false;
	}
	var aFileInfo = attFile.value.split(".");
	var cExten = aFileInfo[aFileInfo.length - 1];	
	
	if (cLimitFileExtension.indexOf(cExten.toUpperCase()) == -1)
	{
			alert("Only the following file extensions are allowed: " + cLimitFileExtensionAlert + "" );
			//document.getElementById(tcFormID).reset();
			return false;
	}
	return true
}
	function setDummy(){
			var dummy = document.getElementById("dummy");
			var attFile = document.getElementById("attFile");
			if (dummy==null) return;
			if (attFile==null) return;

			dummy.src = attFile.value;
	}