function trim(inputString) {
   // Removes leading and trailing spaces from the passed string. Also
   // removes consecutive spaces and replaces it with one space.
   var retValue = inputString;
   var ch = retValue.substring(0, 1);
   while (ch == " ") { // Check for spaces at the beginning of the string
      retValue = retValue.substring(1, retValue.length);
      ch = retValue.substring(0, 1);
   }
   ch = retValue.substring(retValue.length-1, retValue.length);
   while (ch == " ") { // Check for spaces at the end of the string
      retValue = retValue.substring(0, retValue.length-1);
      ch = retValue.substring(retValue.length-1, retValue.length);
   }
   while (retValue.indexOf("  ") != -1) { // Note that there are two spaces in the string - look for multiple spaces within the string
      retValue = retValue.substring(0, retValue.indexOf("  ")) + retValue.substring(retValue.indexOf("  ")+1, retValue.length); // Again, there are two spaces in each of the strings
   }
   return retValue; // Return the trimmed string back to the user
} // Ends the "trim" function



function checkFields(obj) {
missinginfo = "";


result = trim(obj.username_form.value);


if (result =="") {

missinginfo += "\n     - Ad";
}



if (missinginfo != "") {
missinginfo ="Aşağıdaki Alanları Doldurunuz:" +
missinginfo;
alert(missinginfo);
return false;
}
else return true;
}



function checkFields2(obj) {
missinginfo = "";


result = trim(obj.yazi.value);


if (result =="" || result.length<2) {
missinginfo += "\n - En az 2 harf girmelisiniz";

}



if (missinginfo != "") {
missinginfo ="Lütfen aramak istediğiniz kriteri belirtin:" +
missinginfo;
alert(missinginfo);
return false;
}
else return true;
}


function check_arama_detay(obj) {
var sayac=0;
missinginfo = "";

if (obj.yazi_onay.checked) 
{
result = trim(obj.yazi.value);

	
	if (result =="" || result.length<2) {
	missinginfo += "\n - En az 2 harf girmelisiniz";
	}
}


if (!obj.yazi_onay.checked){sayac++;} 

   if(!obj.fiyat_onay.checked){sayac++;}
   if(!obj.tarih_onay.checked){sayac++;} 
   if(!obj.kategori_onay.checked){sayac++;}
 
if (sayac==4)
{
	missinginfo += "\n - Eksik Bilgi.";
	sayac=0;
}




if (missinginfo != "") {
missinginfo ="Lütfen aramak istediğiniz kriteri belirtin:" +
missinginfo;
alert(missinginfo);
return false;
}
else return true;
}