function fncheckFileType(fieldName,filename)
{
//This function returns true only for(.gif & .jpg) file else false 
var temp1
filename = filename.toUpperCase()

if (filename == "")
{
	return true
}

temp1 = fnTrim(filename).split(".")

if (temp1.length == 1)
{
	alert("Invalid file Format of " + fieldName)
	return false
}
if (fnTrim(temp1[0])=="")
{
	alert("Invalid file Format of " + fieldName)
	return false
}
if ((fnTrim(temp1[1])=="GIF")||(fnTrim(temp1[1])=="JPG"))
{
	return true
}
else
{
	alert("Invalid file Format of " + fieldName)
	return false
}
}

function fncheckValidFile(fieldName,filename,filetype)
{
//This function returns true only for(.txt) file else false 
var temp1
var type
var length
var flag=0

filename = filename.toUpperCase()
filetype = filetype.toUpperCase()
type = fnTrim(filetype).split(",")
if (filename == "")
{
	return true
}

temp1 = fnTrim(filename).split(".")

if (temp1.length == 1)
{
	
	alert("Invalid file Format of " + fieldName)
	return false
}
if (fnTrim(temp1[0])=="")
{
	
	alert("Invalid file Format of " + fieldName)
	return false
}

for(length=0;length<type.length;length++)
{
	
	if (fnTrim(temp1[1])==fnTrim(type[length]))
	{
		flag = 0
		break;
	}
	else
	{
		flag = 1	
	}
	
	
}

if(flag == 0)
{
	return true
}	
else
{
	alert("Invalid file Format of " + fieldName);
	return false;
}

}