function ChangeText(el,txt, flag)
{
         if (flag)
         {
            if ($(el).val() == txt)
               $(el).val('');
         }
         else
         {
            if ($(el).val() == "")
               $(el).val(txt);
         }
}

function MM_preloadImages() { //v3.0
  var d=document; if(d.images){ if(!d.MM_p) d.MM_p=new Array();
    var i,j=d.MM_p.length,a=MM_preloadImages.arguments; for(i=0; i<a.length; i++)
    if (a[i].indexOf("#")!=0){ d.MM_p[j]=new Image; d.MM_p[j++].src=a[i];}}

}

function isValidEmail( sField )
{
	var emailRegEx = /^([\w-\.]+)@((\[[0-9]{1,3}\.[0-9]{1,3}\.[0-9]{1,3}\.)|(([\w-]+\.)+))([a-zA-Z]{2,4}|[0-9]{1,3})(\]?)$/
	return( emailRegEx.test( sField ) );
}