<!-- Paste this code into an external JavaScript file named: formvalidator.js  -->

/* This script and many more are available free online at
The JavaScript Source :: http://javascript.internet.com
Created by: Amit Wadhwa :: http://amitwadhwa.fcpages.com/javascript.com/formvalidator.html */

function checkThisForm(formname, submitbutton, errors) {
  if (errors == '') {
    eval(formname+'.'+submitbutton+'.disabled=true');
    eval('document.'+formname+'.submit()');
  } else {
    alert(errors);
  }
}

function checkText(formname, textboxname, displaytext) {
  var localerror = '';
  if (Trim(eval('document.'+formname+'.'+textboxname+'.value'))=='') {
    localerror =  '- '+displaytext+' bos geçilemez.\n';
  } else localerror = '';
  return localerror;
}


function checkTextarea(formname, textboxname, displaytext) {
  var localerror = ''
  //textarea1').innerHTML
  if (eval('document.'+formname+'.'+textboxname+'.value.length')=='') 
 // if (eval('document.getElementById('+textboxname+').contentWindow.document.body.innerHTML')=='')
 //if (eval('WYSIWYG.getEditorWindow('+textboxname+').document.body.innerHTML')=='')
{
	//alert(eval('document.'+formname+'.'+textboxname+'.value.length'));
    localerror =  '- '+displaytext+' bos geçilemez.\n';
  } else localerror = '';
  return localerror;
}


function checkNum(formname, textboxname, displaytext) {
  var localerror = '';
  if(isNaN(eval('document.'+formname+'.'+textboxname+'.value'))) {
    localerror =  '- '+displaytext+' Sadece rakam girilebilir. Boşluk girilemez.\n';
  } else localerror = '';
  return localerror;
}

function checkSpaces(formname, textboxname, displaytext) {
	var valid = '0123456789abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ_'; // define valid characters
	var localerror = '';
	if (Trim(eval('document.'+formname+'.'+textboxname+'.value'))=='')
	{
			localerror =  '- '+displaytext+'  boş geçilemez.\n';

	}
	else if(!isValid(Trim(eval('document.'+formname+'.'+textboxname+'.value')), valid))
	{
		localerror =  '- '+displaytext+' Türkçe karakterler haricinde diğer harflerden ve rakamlardan oluşabilir..\n';
	}
	else 
	{
		localerror = '';
	}
	return localerror;
}

function checkmail(formname, textboxname, displaytext) {
  var localerror = '';
  if ((eval('document.'+formname+'.'+textboxname+'.value.indexOf(".")'))<1)  
  {
    localerror =  '- '+displaytext+' adresini kontrol ediniz.\n';
  } 
  else if ((eval('document.'+formname+'.'+textboxname+'.value.indexOf("@")'))<1)     
  //|| document.formname.textboxname.value.indexOf(".") < 1)
  {
	   localerror =  '- '+displaytext+' adresini kontrol ediniz.\n';
  }  
  else 
  {
	  localerror = '';
  }
  return localerror;
}


function checkSelect(formname, selectboxname, displaytext) {
  var localerror = '';
  if(eval('document.'+formname+'.'+selectboxname+'.selectedIndex')==0) {
    localerror =  '- '+displaytext+' bos geçilemez.\n';
  } else localerror = '';
  return localerror;
}

function getRadio(formname, radioname, displaytext) {
  for (var i=0; i < eval('document.'+formname+'.'+radioname+'.length'); i++) {
    if (eval('document.'+formname+'.'+radioname+'[i].checked')) {
      var rad_val = eval('document.'+formname+'.'+radioname+'[i].value');
      return rad_val;
    }
  }
}

function checkRadio(formname, radioname, displaytext) {
  var localerror = '';
  var rad_val    = '';
  for (var i=0; i < eval('document.'+formname+'.'+radioname+'.length'); i++) { //check every radio button by that name
    if (eval('document.'+formname+'.'+radioname+'[i].checked'))  { //if it is checked
      rad_val += '-';
      }	else rad_val += '';
      }
    if (rad_val=='') {
      localerror =  '- '+displaytext+' is Required.\n';
    }
  return localerror;
}

function autoComplete (field, select, property) {
/*onKeyUp="autoComplete(this,this.form.selectboxname,'value',false)" - add this to textbox where you are typing*/
  var found = false;
  for (var i = 0; i < select.options.length; i++) {
    if (select.options[i][property].toUpperCase().indexOf(field.value.toUpperCase()) == 0) {
      found=true; break;
    }
  }
  if (found) {
    select.selectedIndex = i;
  } else {
    select.selectedIndex = -1;
  }
  if (field.createTextRange) {
    if (!found) {
      field.value=field.value.substring(0,field.value.length-1);
      return;
    }
    var cursorKeys ="8;46;37;38;39;40;33;34;35;36;45;";
    if (cursorKeys.indexOf(event.keyCode+";") == -1) {
      var r1 = field.createTextRange();
      var oldValue = r1.text;
      var newValue = found ? select.options[i][property] : oldValue;
      if (newValue != field.value) {
        field.value = newValue;
        var rNew = field.createTextRange();
        rNew.moveStart('character', oldValue.length) ;
        rNew.select();
      }
    }
  }
}

function Trim(s) {
  while ((s.substring(0,1) == ' ') || (s.substring(0,1) == '\n') || (s.substring(0,1) == '\r')) {
    s = s.substring(1,s.length);
  }
  while ((s.substring(s.length-1,s.length) == ' ') || (s.substring(s.length-1,s.length) == '\n') || (s.substring(s.length-1,s.length) == '\r')) {
    s = s.substring(0,s.length-1);
  }
  return s;
}

function isValid(string,allowed) {
  var valid = '0123456789abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ'; // define valid characters
    for (var i=0; i< string.length; i++) {
      if (allowed.indexOf(string.charAt(i)) == -1) return false;
    }
    return true;
}