// JavaScript Document
function clearDefValue(input){
	    document.getElementById(input).value = '';
      document.getElementById(input).style.color = 'black';
    };
	
	
function replacetext(input){
	var str = document.getElementById(input).value; 
	var trimmed = str.replace(/^\s+|\s+$/g, '') ;
	if(trimmed=='')
	{	    
		if(input=='mathima') document.getElementById(input).value = 'θέλω να μάθω';
		else if(input=='area') document.getElementById(input).value = 'Συμπληρώστε Περιοχή...';
		};
    };
	

function getInternetExplorerVersion()
// Returns the version of Internet Explorer or a -1
// (indicating the use of another browser).
{
  var rv = -1; // Return value assumes failure.
  if (navigator.appName == 'Microsoft Internet Explorer')
  {
    var ua = navigator.userAgent;
    var re  = new RegExp("MSIE ([0-9]{1,}[\.0-9]{0,})");
    if (re.exec(ua) != null)
      rv = parseFloat( RegExp.$1 );
  }
  return rv;
}	
function checkbrowser() {
$(document).ready(function() {	
   var ver = getInternetExplorerVersion();
   if ( ver > -1 )
  {
    if ( ver < 7.0 )  
	jQuery("<img id='browser' src='"+ JSFolder +"/images/browser.gif'/>").appendTo('body');
  }
		   });
}


function limitText(limitField, limitCount, limitNum) { 
	if (limitField.value.length > limitNum) {
		limitField.value = limitField.value.substring(0, limitNum);
	} else {
		limitCount.value = limitNum - limitField.value.length;
	}
}