//  alert(file_filter('pdf','doc','ppt','xls','rtf','txt','zip','rar',this));

//  if (document.form1.cv_url.value!='')
//  errors+=file_filter('pdf','doc','ppt','xls','rtf','txt',document.form1.cv_url.value);

// IF Called from Object ...............
// call method of this function (IF from onchange)--- 
//	alert(file_filter('pdf','doc','ppt','xls','rtf','txt','zip','rar',this));

// ---------
// call method of this function (IF from string_Url_chek)--- 
//	if (document.form1.photo_url.value!='')
//  errors+=file_filter('jpg','pdf','cdr',document.form1.photo_url.value);
 
function file_filter()
{
var i=0,j=0;
var t='';
var errors='';
var arg=file_filter.arguments;

// ............... IF Called from Object ...............
var str1=arg[arg.length-1].value;
// ............... IF Called from String Url ...............
var str2=arg[arg.length-1];

if (str1) str=str1; else str=str2; 

if(!str) return errors='File dosen\'t have right format';

var ext=str.substring(str.lastIndexOf(".")+1,str.length);
	for (j=0;j<=arg.length-2;j++)
	{	
		t=t+'.'+arg[j]+'  ';
	}
	//alert(t);
	for (i=0;i<=arg.length-2;i++)
	{	//alert('chek for '+arg[i]);
		//alert(ext+'   '+arg[i]);
		if (arg[i].toLowerCase()!=ext.toLowerCase()) 
		errors='File dosen\'t have right format \n File should be only'+t;
		else 
		{ 	if (str1) 
			//errors='Yes it is OK';
			errors='';
			else
			errors='';
			break;
		}
	}
	//alert(str);
	//alert('This File dosen\'t have right format \n File should be only '+arg);
	return errors;
}